Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
LI27.35-P-079971
Service Bulletin/Repair Instructions
Complaint Possible complaints about shift quality, issues with learning the park lock, and slipping/rinse entries in the EEPROM or Transmission Health system following the replacement of the below components: - The electrohydraulic control unit (EHS valve body) in transmission 725.0/725.1 - The repair kit for the control unit (VGS) in transmission 725.0 Cause Missing, incorrectly installed, or damaged guide tubes on the EHS valve body. Remedy Check for the correct installation of the guide tubes (refer to attachments under “Cause”), correct installation if necessary. Parts Catalog References: NAG3M 725.1 AND NAG3C 725.0 (AMG only): Part numbers 100, 120, 150, 160 NAG3C 725.0 (Non AMG): Part numbers 280, 290, 330, 340 NOTE: If any of these guide tubes are not installed and the vehicle is driven, it will create several rinse and slipping events in the EEPROM data. These values caused by incorrect installation need to be erased to prevent future misdiagnosis. Submit a TIPS case to the Powertrain inbox with the following to receive the necessary reset password: - Initial Quick Test w/ Freeze frame data - VGS Control Unit Log - IPR Result - Initial EEPROM data (before repairs) - Latest EEPROM data - Photo of oil level ultrasonic measurement next to XENTRY specifications Please provide detail regarding the reasoning for the initial replacement in your workshop findings and measures performed. (This topic was covered in the July 2022 and July 2024 Passenger Car Tech Topics)
LI27.10-P-075869
Service Bulletin/Repair Instructions
Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistaken for a harsh shift. Cause Modified oil quality of the transfer case over time Remedy 1. Check initial quick test for faults in the following control units. N45 or N15/7 - All-wheel drive (ARS) N127 - 'Drivetrain' (PTCU) control unit Y3/8 - Transmission control for 9-gear transmission (VGS) N3/10 - Engine electronics for combustion engine If faults are present: Process them as per the guided test in Xentry. If no faults are present: 2. Check the transmission oil level If the oil level is correct: 3. Unplug the connector for the transfer cases control unit and reassess the vehicle on a subsequent test drive If the complaint no longer occurs with the control unit disconnected: 4. Perform an oil change of the transfer case according to WIS specifications - Collect an oil sample of the original fluid 5. Complete all transfer case Tech-in processes located under VG Control Unit > Adaptations - Resetting the oil service data - Calibration of N15/7 5. Perform road test of vehicle to bring transmission to operating temperature ( >60C ) 6. Operate vehicle in full circle with steering at full lock - 5x to the left - 5x to the right 7. Perform an extended 200mi road test to ensure the clutches are properly conditioned with the new oil. 8. Reassess the concern and release the vehicle if no longer present. If the concern continues to occur with the control unit disconnected or after the above steps have been performed, please submit a TIPS case to the Powertrain inbox with the following information: - Initial quick test with fault freeze frame data - Initial transmission EEPROM data - VGS and Transfer Case Control Unit Log (N45 or N15/7) - Photo of the original oil condition - What color was the fluid drained from the transfer case before the oil change? - Was an oil sample collected, and can you provide a photo of the original fluid? - What color and part number fluid was used during the oil change? - How far was the vehicle driven after?
LI54.30-P-078309
Service Bulletin/Repair Instructions
Complaint Head-up display permanently or sporadically unavailable - with warning message in driver display (see attachment) Head-up display permanently or sporadically unavailable - without warning message in driver display. Display permanently or sporadically discolored and out of focus (see attachment). Cause Software for the A40/12 - Head-up display and N133/1 - Instrument cluster (IC). Remedy Software for the A40/12 - Head-up display and N133/1 - Instrument cluster (IC). Update: A new software version is planned to be released by the end of 2025. Once confirmed the LI will be updated. TIPS cases are no longer needed. Note: Please do not replace any parts for this complaint. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
LI42.10-P-079904
Service Bulletin/Repair Instructions
Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light brake pressure/modulations. Remedy This condition can be duplicated on most vehicles. To validate, use a like for like reference vehicle. The noise is normal behavior under the conditions listed. With very light brake pressure this noise can be induced/caused due to normal brake pad and brake rotor vibrations. Exchanging brake components will not rectify.
NCU - 2024090007
Service Campaign
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control unit software does not correspond to current production specifications. As a consequence, the functionality of the post-catalyst oxygen sensor may be impaired due to increased thermal loading. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software.
LI82.62-P-078631
Service Bulletin/Repair Instructions
Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Note: Please refer to this document in the warranty claim and, once diagnosis is completed, select the damage code depending on the component part that is causing the issue. • If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Note: In this case, do not use the damage codes for the speakers in the warranty claim.
LI91.10-P-078305
Service Bulletin/Repair Instructions
Complaint The "Easy entry and exit feature" function deactivates itself after a brief period. (see attachment). Cause The cause is currently being investigated. Remedy Update the HU7 to the latest software version, then perform a factory reset of the HU7. Steps to perform factory reset: Navigate to Settings > System > Reset > Reset to factory settings and confirm. If the problem persists, please record HU7 log and also a trace of the Body CAN (For Star 2 Body Can 1 and for Star 3 Body Can 2) during the symptom and send via a TIPS case to the Telematics team. Note: Only collect and submit the log and trace if the symptom can be reliably reproduced.
LI83.30-P-077763
Service Bulletin/Repair Instructions
Complaint Customer concern of Air Conditioning not cooling. *NOTE - Use of tracer DYE for leak checks is not approved. Only approved leak check procedures as per WIS are approved. Cause Possible refrigerant leak. Remedy Perform the following measures : *Important* - Photo documentation requirement is no longer in effect as of 10/1/2025. Remedy 1: Replace Evaporator (Only applies to vehicles produced PRIOR to April 15, 2022 and has NOT had the evaporator replaced previously) 1. Ensure that the rest of the AC system has been thoroughly checked for leaks with forming gas as per WIS before condemning the evaporator. 2. If no other leaks are found, replace the evaporator Note - *If the evaporator housing has been opened or the evaporator or housing has been tampered with, the claim will be debited. Remedy 2: (Applies to all vehicles produced on or AFTER April 15, 2022 up to April 1, 2025) 1. Ensure that the entire AC system has been thoroughly checked for leaks with forming gas as per WIS . 2. If no leaks were found AND the system came in with no cooling/low charge, OR the evaporator is suspected of leaking: 3. Replace ONLY the expansion valve bracket, seals, and bolts as supplied in kit A 167 832 47 00, in accordance with the procedure outlined in WIS document AR83.30-P-5520ME. 4. IF THE PRODUCTION DATE IS BETWEEN JUNE 1, 2023 AND JULY 1, 2024, REPLACE THE DRYER AS WELL. (NOT THE CONDENSER) 5. After, charge the system and perform a few drive cycles. 6. Recheck the vehicle for leaks. 7. If no leaks are found, the vehicle can be released. 8. If a minor leak is detected that is less than 50ppm, then perform the following steps: • If a leak is detected, fill the system with forming gas • Close all doors and windows for 10 minutes. • Vehicle off with no blower activation. • Open the driver's door and measure ppm detection as soon as the door is open and the sniffer goes into the vehicle. • If no leaks are measured, fill the system and release. Remedy 3: (Only applies to vehicles produced AFTER April 1, 2025) *TIPS Case Required if leak is found* Ensure that the entire AC system has been thoroughly checked for leaks with forming gas as per WIS . If any leaks are found, then open a TIPS case with the following: 1. Initial Quick Test 2. Create a short video of the actual pressures via AC machine, showing the engine running, and hold a copy of the VIN/RO in view as well. 3. OBS recording of XENTRY AC actual values of compressor request to be on and current value. (Instructions in Attachments) 4. Video recording of the leak being found via sniffer at the R/F AC drain after removing the under dash panel if the evaporator is suspected. (see attached videos) 5. If the evaporator is found to be leaking via sniffer, another video needs to be uploaded (or a continuation if only making the video after checks), showing the expansion valve being checked for leaks. 6. If no leaks are found with the sniffer at the expansion valve, spray soapy water mix on the expansion valve and check for leaks. Upload a video showing the spray test and VIN. 7. Open a TIPS case in the HV/LV inbox labeled "167 AC leak after April 1, 2025" with all attachments. NOTE: (Applies to all 167's) • Please see the list of WIS documents for forming gas leak check and recharging of the system. • Review PCTT 9/25 for forming gas best practices. • Review PCTT 5/25 for bracket removal best practices. • Condenser replacement is NOT authorized as a suitable repair in lieu of the dryer not being available. • Ensure that the correct damage code is used for failed component. (see list of damage codes) • Evaporator housings that have been disassembled, present with physical damage, or tags that show signs of tampering will be debited in full.
LI46.00-P-079786
Service Bulletin/Repair Instructions
Complaint Noise from front end attributable to steering gear. Cause During diagnostics of a front end noise, workshop is under the impression the noise is coming from the steering gear. Remedy Workshop diagnostics point to the steering gear as the root cause of the noise and the below LI's have been ruled out. • LI46.35-P-067339 - "Rattling or Humming Noise When Steering" • LI46.35-P-071461 - "Check Tie Rod Outer Joint of Steering Gear" • LI46.10-P-077391 - "Knocking Noise In The Area Of The Steering Gear or Steering Column Tube When Braking Or Moving Off; The Steering Wheel Can Also Be Felt To "Crack"" After the above has been completed and the diagnostics point to a steering rack noise, please open a TIPS case to the Body/Chassis/Entertainment inbox with the following information: • Video underneath the vehicle with clearly audible noise. • Vehicle checked for history of collisions. • List of other checked components (suspension, drive line components, wheel bearings, etc...).
LI54.10-P-071499
Service Bulletin/Repair Instructions
Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM or EZS cannot record the data if the battery is discharged. Note: A discharged battery does not necessarily need to be replaced. A discharged battery may be recovered with no permanent damage. Remedy 1) If the battery is discharged, charge the battery. Review WS54.00-P-0037B for minimum charger specifications. • Note the amperage difference between trickle (maintainer) chargers of at least 16A and quick chargers of at least 30A. • Review AP54.10-P-5449U. Note when battery is sufficiently charged the charger current is less 5A. 2) While charging the battery, analyze the vehicle data to determine root cause of discharge using the following data points: • NOTE: For guidance on use of the on-board electrical data please review the AKUBIS video titled "New onboard electrical system diagnosis shown on BR 166". The video can be accessed through WIS by following the path WSM--> content by model series --> passenger cars --> ML-Class --> Model 166 --> group 54 --> New onboard electrical system diagnosis. • Refer to the March 2023 PCTT for the video walkthrough of analysis as well as the attachment of the slides to this Li. • Review GF54.10-P-1012A regarding what can cause deep discharge protection to not end a battery draw. • Review SI54.10-P-0024A for proper maintenance of the vehicle. For Star 2 vehicles: -Review FSAM on-board electrical data conspicuous records • NOTE: This data can be found via FSAM N10/6 -> Actual Values -> On-board electrical system -> On-board electrical system data For Star 3 vehicles: -Review N73/3 EZS on-board electrical data conspicuous records • NOTE: This data can be found via EZS N73/3 -> Actual Values -> On-board electrical system -> On-board electrical system data 3) Determine if root cause is due to: • vehicle technical issue? • customer behavior? NOTE: Recommend using battery analysis sheet found in XiW -> Local Contents -> Diagnostic info -> Battery Discharge Worksheet 4) If battery still does not accept charge AND the vehicle does not fall within the parameters of improper maintenance, then create a TIPS case. *IMPORTANT* - If the improper maintenance/use is found during diagnosis, DO NOT open a TIPS case. If a TIPS case is opened, it will be marked 1 star and directed to your assigned FSE for review. TIPS Case must include with the case: • Amperage setting of charger and time battery was on charger • XENTRY Battery Tester results • Voltage of battery taken with multimeter: Do not connect charger while taking measurements • N10/6 FSAM, (N73 or N73/3) and (N73*1 or N73/3*1) • Workshop analysis of conspicuous data • Root cause analysis for battery discharge based on the above documents (technical, customer, etc.) • NOTE: For expedited results when creating a case write customer complaint as "XENTRY Battery Tester implausible".
LI32.50-P-079670
Service Bulletin/Repair Instructions
Complaint Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain Concern 3 - Noises when cornering and performing alternate steering movements Concern 4 - Non-assignable noises Cause Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain. These are normal operating noises of the hydraulic high-pressure pumps. Explanation: This is the "preview noise" which is heard when recovery mode is in operation, but which can also occur when driving over very uneven ground in the Comfort and Curve drive programs. This is a normal operating noise which is caused by the hydraulic high-pressure pumps (MPE). To compensate for the unevenness of the ground, large oil flows need to be generated and to do so, the MPEs turn at very high rotational speeds. Note: In the "ECO" drive program, the "Preview" function is deactivated so these noises should not occur when driving over uneven terrain; however the vehicle body will move noticeably. Concern 3 - Noises when cornering and performing alternate steering movements - reversing noise. Repeated rapid steering out of a curve generates a "grunting" noise. Explanation: This noise is caused by the MPEs when the pump's direction of rotation is reversed. Note: The reversing noise can occur in all drive programs, but is most clearly reproducible in the Curve drive program and in Curve level 3. Carry out an evaluation firstly in Curve levels 1 to 3 (at the highest Curve level 3, the noise will also be at its loudest!), and then in the Comfort drive program. Concern 4 - Non-assignable noises. Remedy Generally check whether the same noises also occur in ECO mode - in this mode the Preview/ROAD SURFACE SCAN function is deactivated and the high-pressure pumps run at reduced speed. Consequently, it is possible to differentiate between normal operating noises and unusual noises. Regarding 1, 2: Explain the high-pressure system, replacing the suspension struts or pumps is not useful, as these noises are caused by the high-pressure pump unit and should be regarded as normal operating noises. Regarding 3: This is currently a normal operating noise and represents the series production configuration; consequently replacing the components is not useful. Regarding 4: There will certainly be other unknown noises that we are not yet familiar with; therefore please report these as well. For these, create a TIPS case and include informative video recordings of the noises. The driving situation in the drive program in which the noises occur should be shown. For comparison, also attach a recording of this same driving situation in ECO mode. Additional attachments required: - Logs for control units N51/8, M67, M67/1, M67/2, M67/3. - Actual values for the pressures of the four hydraulic high-pressure pumps at standstill.
LI54.10-P-079772
Service Bulletin/Repair Instructions
Complaint After a software update of component LIB48_222 - G1/3 (48 V on-board electrical system battery) from software release A 000 902 50 48 to software release A 000 902 15 89, the fault code B183319 may be output. B183319 "The battery for the 48V on-board electrical system has a malfunction. The limit value for current has been exceeded" Cause Anomaly in the software update Remedy Please perform the following steps in the specified sequence: 1.) Delete fault codes 2.) Disconnect XENTRY Diagnosis and the 12 V battery charger 3.) Disconnect ground cable from the 12 V battery 4.) Ensure bus idle for at least 10 minutes 5.) Re-connect ground cable to the 12 V battery 6.) Delete fault codes again 7.) Perform a test drive 8.) Check fault codes > If fault code B183319 is still current, continue with the guided fault analysis in XENTRY Diagnosis. > If fault code B183319 goes to stored and can be cleared, no further action is required.
LI35.31-P-079734
Service Bulletin/Repair Instructions
Complaint 1. Howling noises from the area of the rear axle 2. Oil discoloration is present during oil change (water in oil) 3. Oil leakage from the breather cap Cause The bleed line of rear differential may be misaligned, causing the rubber end pieced to rest on the wheel well liner. When driving in the rain, water enters through the rubber elbow from the soaked wheel well liner. Remedy Perform a road test and determine the location of the noise using NVH equipment. If the rear axle differential is the root cause of the noise, continue with the following: 1. Drain oil from rear axle differential and check for signs of water intrusion (discoloration/cloudiness) Remedy A: If no water is found 2. Remove/install left wheel well trim. 3. Remove rubber end piece from the bleed line. 4. Install modified end piece with the part number A 167 351 50 00. 5. Identify source of the noise and, if necessary, replace the parts causing the concern. Remedy B: If water is found 2. Remove/install left wheel well trim. 3. Remove rubber end piece from the bleed line. 4. Install modified end piece with the part number A 167 351 50 00. 5. Replace rear axle differential
LI91.12-P-079436
Service Bulletin/Repair Instructions
Complaint: When activating the seat heating for the rear seat cushion, the heating of the backrest is activated instead and vice versa. Cause: Coding in the rear SAM. Remedy: Perform SCN coding in the rear SAM.
CL - 05012025
Other
In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA is extending the warranty coverage for the Diagnostic Module for Tank Leakage detection (“DMTL”) on your vehicle from the original New Vehicle Limited Warranty of 4 years / 50,000 miles to 15 years/150,000 miles (whichever occurs first). This applies to the vehicle regardless of ownership.
LI54.71-P-078802
Service Bulletin/Repair Instructions
Complaint MBUX head unit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or (549+U19). Cause Head unit software variant. Remedy For all chassis use Xentry to update head unit (A26/17). Target boot software number should be either: • 247 904 6600 (E905.4) OR • 247 904 7500 (E906.1) If vehicle fits all criteria and either target software is not available via Xentry, please open an XSS ticket. Damage code 5424x-01 may be used with a repair start date after June 2nd, 2025.
LI33.30-P-056665
Service Bulletin/Repair Instructions
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened and must be tightened to the specified torque. Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove outboard side shafts (extract outer joint gearing from wheel hub) 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") using Molykote and leave to dry for one hour in removed condition 4. Reinstall side shafts
NCU-2025050001
Emissions
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that certain Model Year (“MY”) 2019 – 2022 C-Class, CLS, E-Class, E-Class Coupe/Convertible, GLE/GLS-Class and AMG GT vehicles (206, 257, 213, 238,167 and 290 platforms) are potentially affected with multiple topics related to the 48V battery management system, which erroneously may or may not illuminate the check engine malfunction indicator lamp (‘MIL’) in one or more of the following circumstances: • Memory error causing battery switch to open, prohibiting vehicle to restart; • The battery thermal management system, power supply voltage (12V) measurement and 48V battery switch diagnostic may not be monitored by the OBD-system; • Plausibility check of the temperature sensor, temperature range and Real Time Clock (RTC) monitoring might not operate as intended. MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will update the drivetrain control unit software on the affected vehicles. Affected customers will be notified via First Class letter to have the update performed on their vehicle.
LI54.65-P-078762
Service Bulletin/Repair Instructions
Complaint Please note that the exact quick test conditions must be met as seen below. If not exactly as listed below, there is no need to create a TIPS case referencing this LI unless further assistance is needed outside of this document. Conditions Instrument Cluster Message: "Park Assist Inoperative" and Hardware part numbers: A0009019716 or A0009016022 B223263 with Bosch-ID C259; A+S (Active and Stored) and B223255 with Bosch-ID 1B5D; A+S (Active and Stored) Notes: • Other DTC's are permitted but the above three conditions must be met. If they are not met, this LI is not applicable. • See attachment "LI Criteria" for an example. • Attachment portrays a quick test with non-matching criteria and therefore does not require a TIPS case. Cause Under analysis. Remedy Please do not make any attempts to repair the park control unit. Do not flash or SCN code. Open a TIPS case.
LI82.85-P-078303
Service Bulletin/Repair Instructions
Complaint Individual functions such as sliding sunroof or roller sunblind can no longer be operated using the gesture recognition system. Cause Gesture recognition system control unit software N168 Remedy For vehicles before modification year 23/2: Perform SCN coding in control unit OMSH223 (N168). For vehicles as of modification year 23/2: Considered to be a series production configuration. A change will not be possible in future. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
LI46.10-P-078012
Service Bulletin/Repair Instructions
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Test: Please perform the new SCN coding for HOSWD control unit (N179/1) (available since May 2025). Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223). Erase fault memory Remedy: Switch on ignition without touching the steering wheel. If after 10 seconds without touching the steering wheel, one of the two fault messages appears in the IC: Please check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). If there is visible damage -> replace steering wheel electronics or feed lines. If there is no visible damage -> Please create TIPS case! If no yellow message appears in the instrument cluster within 10 seconds: Please grab the steering wheel all the way round, including the 6 o'clock chrome molding, with both hands (see picture 1). If the fault is triggered by grabbing the steering wheel rim or pressing on the 6 o'clock clasp, check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). If there is visible damage -> replace steering wheel electronics or feed lines. If no fault is visible: Please open a TIPS case! In the event of a customer complaint and further fault code in HOSWD: B1E7713: Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). B1F1F04: Check hand detection system control unit; if necessary swap with donor vehicle (ensure that the HW part numbers are identical).
LI82.10-P-078301
Service Bulletin/Repair Instructions
Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp. Remedy NOTE: If a pressure compensation diaphragm is fitted in the housing cover, then the lamp unit is a "closed system". Headlamp: Remedy 1 Clearing fogged/condensed LED headlamps and LED rear lamps: 1. Drive vehicle into workshop (temperature higher than +18 °C/+64.4 °F) and connect the exhaust extraction. Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Clearing fogged/condensed halogen/xenon headlamps: 1. Drive the vehicle into the workshop (temperature higher than +18 °C/+64.4°F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine. 3. Open the hood. 4. Switch off the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). Note: If there is no visible reduction in the formation of condensation, check the headlamp for damage. (See Remedy 2) It is not physically possible to defog the headlamps completely. Fogging does not impair the operation or the service life of the headlamp. Remedy 2 A damaged headlamp can be identified as follows: 1. Check the headlamp for external damage and that the cover caps and the diaphragm are correctly seated. 2. Check the electrical connectors of the plugs and pins. 3. Check for leak tightness in accordance with LI82.10-P-078896 The test can only be conducted on headlamps. 4. If the headlamp or the rear lamp has any external damage, replace the component part in accordance with the WIS instructions.
LI82.10-P-078896
Service Bulletin/Repair Instructions
Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a technical impairment of the headlamp. A leak test must be performed to determine if physical fogging exists or if the headlamp is leaky. Remedy Check for external damage: You can identify a damaged headlamp in the following way: For headlamps with a closed system 1. Check the headlamps for any external damage and check also for correct seating of the Gore-diaphragm/correct latching of the cover caps. 2. If the headlamp exhibits any external damage, replace the headlamp. For headlamps with an open system 1. Check the headlamps for any external damage and seal off the vent, then make sure the cover caps are latched correctly into place. 2. If the headlamp exhibits any external damage, replace the headlamp. Note: External damage to the headlamp does not present a warranty or goodwill case. 1. Clear fogged/condensed LED headlamps and LED rear lamps: 1. Drive the vehicle into the workshop (temperature higher than +18 °C/+64.4°F). Note: Do not perform an engine wash before the defogging test. 2. Switch off the engine and connect battery support via a charger. 3. Open the hood or trunk. 4. Switch on the lights. 5. Leave the vehicle in this state for 60 minutes. 6. Check for formation of condensation, a significant reduction in the formation of condensation must be clearly recognizable (thawing progress). 7. If the condensation has disappeared, nothing else has to be done. Note: If defrosting has been performed, you can skip the first step. 2. Leak test of headlamp with overpressure: • Connect test adapter to pressure tester. (Figure 1) • Check test adapter for leak tightness. To do so, connect plug and coupling (picture 2) and apply a maximum overpressure of 30 mbar. The pressure must remain constant. If the pressure does not remain constant, use a new adapter. • All vents have to be sealed with sealing compound and the existing diaphragm with the stamp (picture 3 [3]). (Picture 4) Make allowance for the different headlamp variants here (there are different outlet openings). • Check if the headlamp needs to be removed to gain access to the diagnostic socket on the headlamp housing. • Plug the adapter onto the diagnostic socket on the headlamp housing. (Picture 5). • Apply a maximum of 30 mbar overpressure to the headlamp housing. Note: If the maximum overpressure of 50 mbar is exceeded the headlamp seal will be damaged (picture 6). • If a pressure drop of less than 10 mbar is measured within 30 seconds, the headlamp is tight and there is natural physical condensation. • If a higher pressure drop than 10 mbar is measured within 30 seconds, the headlamp is leaky. Note: The leaky position can be localized with the aid of soap suds. If the pressure test is not passed, the headlamp is leaky. If the cause cannot be rectified, the headlamp must be replaced. Note: If the headlamp is replaced, no dry packs may be installed on the new replacement headlamp. AR82.10-P-5455WT was created for the pressure test. This AR can be used as a reference manual for all closed headlamps. In the event of an open headlamp system, the vent ducts must be sealed before the pressure test.
LI47.10-P-079166
Service Bulletin/Repair Instructions
Complaint A pulsating knocking noise (e.g. clattering) can be heard underneath the bench seat, particularly in the case of a full tank (1/1 fill level). Cause The vibrating air column of the purge flow volume triggers the fill limit vent valve (FLVV) to open and close repeatedly when the fuel tank is full. Remedy By reducing the fuel quantity by around 5 liters, the noise can no longer be heard. In isolated cases, the noise can also be amplified by a fuel tank installed under stress and therefore lines adjacent to the body-in-white (above the fuel tank). In this case, the installation position of the fuel tank and the contact surfaces to the body-in-white must be checked. To do so, loosen the fuel tank and refasten it. Please do not replace component parts such as the fuel tank, activated charcoal canister, purge valve or delivery module, as this does not provide a remedy. If a similar noise can be heard with a tank fill level of, for example, 3/4 or 1/4 and not with a full tank (1/1), there is a different issue.
LI82.30-P-078932
Service Bulletin/Repair Instructions
Complaint Windshield streaking on driver's side. Cause Incorrect replacement wiper blades may have been installed A167 820 92 01 may have been installed instead of A167 820 87 03. After longer periods of non-use, the wiper blade lip may compress slightly and result in streaking. Only vehicles built before October 20th, 2022 should use wiper A167 820 92 01. Remedy Install the correct part number for the replacement wiper blades.
LI54.71-P-079104
Service Bulletin/Repair Instructions
Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("- -"). • Flashing when current vehicle speed is under speed limit. • Flashing between US speed limit symbol and European speed limit symbol. Cause Under Investigation Remedy Under investigation. One option is to turn off Traffic Sign Assist until the investigation is completed. Once completed this LI will be updated. No TIPS case is necessary. Do not replace parts.
LI54.10-P-069698
Service Bulletin/Repair Instructions
Complaint This LI does Not apply to 223 or 206 which use a different generation of 48V systems. Please follow the relevant guided tests for the 223 and 206. For 223 with fault code B1FCB97 follow LI54.10-P-076026. Various causes are possible. The faults listed in the various causes do not all have to be present at all times. Some of these complaints may overlap. Rely on the faults listed in the Cause section for identifying the correct Remedy. 1. No start 2. Yellow or red instrument cluster message for 48 V on-board electrical system battery (G1/3) 3. Limp home mode, overheating, A/C not blowing cold, or loss of acceleration 4. Check Engine Light Cause Cause 1: Software causes Intermittent No Starts with fault B183387 in DC/DC converter N83/1 Cause 2: Software causes Permanent No Start with fault B183349. May also have fault B183371. Cause 3: Hardware short circuit in 48V system causes fault B183319 in 48V battery. May also have fault B183371. Cause 4: Internal 48V battery Peltier cooling element failure causes fault B183397 Cause 5: This will Always have fault code B183371 but different from cause 2 and 3 -- it will Not have B183349, B183319, or any other faults in the 48V battery. This will only have fault B183371 in 48V battery. Cause 5 is from the 48V battery detecting an abnormality which then causes the 48V battery to disconnect itself. The disconnected 48V battery then causes subsequent symptoms: Limp Home Mode, overheating, A/C not blowing cold, or loss of acceleration Cause 6: Check Engine Light with fault P0606F1 in the N127 PTCU Cause 7: Check Engine Light with possible no start and fault P057FF1 Remedy Note: each of these remedies correspond to a specific cause. Make sure to match correct Cause with Remedy. Remedy 1: 1. Check the 12V power supply and LIN connection 2. Update software in G1/3 (48V battery) using newest XENTRY software and Add-ons 3. Road test and release vehicle if no further symptoms Remedy 2: 1. Charge the 12V battery (Charging current <5A) 2. Update software in G1/3 (48V battery) using newest XENTRY software and Add-ons 3. Road test and release vehicle if no further symptoms If the faults return or cannot be cleared: 1. XENTRY MUST be connected with VCI cable to correctly complete this remedy. 2. Complete guided test for B183349. 3. If guided test completes, vehicle starts, and drive cycles show no further symptoms, release vehicle. 4. If after guided test completes, XENTRY states to replace 48V battery: replace only 48V battery. If vehicle is a MY21 w/M256 engine, update SW in 48V battery 5. If this is a repeat visit for fault B183349 and guided test has already been completed, open a TIPS case. 6. If guided test does not complete OR symptoms are still present open a TIPS case. 7. If communication cannot be established with 48V battery perform physical layer check at 12V wiring to DCDC. If no abnormalities found, replace the 48V battery. 8. If guided test completes but a new fault code is present (such as B183319, B183371, etc.) follow the relevant Cause/Remedy for that fault in this LI. Remedy for 3: 1. If fault is not Current (only Stored): 1. Update software in G1/3 (48V battery) using newest XENTRY software and Add-ons 2. Road test and release vehicle if no further symptoms If the faults return or this is a second visit after the SW update: 1. Complete the guided test for B183319 2. Perform XENTRY actuations for all 48V components. 3. Create a TIPS case with ALL Preliminary measures required as noted below for Remedy 5 4. Upload to TIPS case ISA performance data from the N129. 5. ISA performance data location in XD: 6. N129 control unit under Special Procedures 7. "Procedures for support queries to market support" 8. "Collation of diagnosis performance data" 9. "engine at idle" 10. After next screen loads with data click continue. The next screen will show where the .CSV file is located in your XENTRY. Navigate to this location in XD and upload this CSV file to the case. 11. Note it is impor
LI27.35-P-079039
Service Bulletin/Repair Instructions
Complaint A clicking/ticking/taping noise from underneath the vehicle with engine off during ECO stop event or after parking See video for example Cause Noise originates within the transmission valvebody Remedy Take a video from underneath vehicle recording the noise Pull EEPROM data, Inital Quick Test, and Control Unit Log Please open a TIPs case providing all data to assess next steps.
LI72.20-P-075746
Service Bulletin/Repair Instructions
Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. E.g. when stored in trouser pocket, handbag etc. Remedy As of the 6th generation, the vehicle key can be recoded so that the tailgate no longer opens as a result of a long press on the button, but by double-clicking on the button instead. This reduces the likelihood of the button being activated accidentally or unintentionally. The recoding can be carried out as follows: 1. Enter AO Code O19 into VeDoc (O for Oscar, not "zero") 2. EZS N73: Perform SCN coding 3. Deactivate the vehicle key (a successful deactivation is indicated by the LED lighting up 2x briefly and then 1x for a long period). 4. Place the vehicle key on the key symbol in the storage compartment and then switch on the ignition. All other vehicle keys must be outside of the vehicle when doing this! Perform steps 3 and 4 successively for all vehicle keys. Notes: 6th, 7th and 8th generation keys can be deactivated as follows: Up to modification year 22/1 double-click on the locking button As of modification year 22/1, by pressing and holding the locking button + double-clicking on the release tab On model series 167, the storage compartment with the key symbol is located in the armrest. The SCN coding from the EZS is only transferred correctly to the vehicle key under the following conditions: Only one vehicle key is located in the vehicle, this key has been deactivated and it is positioned on the marking in the storage compartment for the data transfer. The costs for this adaptation are to be borne by the customer.
LI82.70-P-077433
Service Bulletin/Repair Instructions
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly difficult to understand as the speed rises. Cause A. Seating of the microphones in the headliner. Side edges are covered by the textile cover (see picture "1") B. Assembly of microphones (B25/20 or B25/21) in the headliner. C. Dirt inside the microphone housing Remedy 1. Press finger on rear of microphone (on adhesive tape) 2. Remove microphone cap from the front 3. Eliminate protruding material residues of the microphone cutout at the headliner, e.g. with a soldering iron. The microphone must be seated in the headliner as shown in picture "2". 4. Push microphone from behind until it is firmly pressed into the headliner 5. Maintain pressure and press/clip cap into microphone from the front. Note: The cover cap must be clearly heard and felt to engage. 6. This procedure must be carried out on both microphones (B25/20 and B25/21) Note: • It is recommended to replace the cover caps. • The non-woven cloth in the cover cap protects the microphone from soiling and must not be removed. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes resulting in the same or similar symptoms or conditions described in this document, and trained professional service technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
LI54.65-P-066284
Service Bulletin/Repair Instructions
Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The reversing camera or the 360° system functions normally when activated manually or by engaging drive range "R". Cause This is not a malfunction, but an intended system behavior. Calibration of the reversing camera is in progress. The calibration is completed by: • Opening the camera cover for a maximum of 5 cumulative minutes. • If the vehicle speed is < 35 km/h (<22 MPH). • The steering wheel angle is < 10°. If calibration is aborted by exceeding one of the above conditions, the camera retracts and the calibration will re-attempt once the conditions are achieved and the speed returns to the range of 18 km/h (~11 MPH). Remedy SCN code PARK213M on MFA2 facelift vehicles produced after 09/2024 (A-Class, CLA, GLA, etc...) so the complete calibration speed window is available. For vehicles with PARK213M or PARK223 a calibration is completed successfully by: • Driving forward (typically less than 1 minute). • Vehicle speed is < 35 km/h (<22 MPH). • The steering wheel angle is < 10°. • During daylight. • Without a vehicle following too closely (camera must be able to see asphalt). When calibration has completed successfully, the camera door closes automatically for the rest of the driving cycle. The camera will now only open if the customer requests (Example: Engaging reverse gear). The calibration of the camera will re-initiate every drive cycle (ignition change). The customer can generally perform calibration at the first attempt while briefly maintaining a speed range of 15 km/ h (~9 MPH) and 35 km/h (~22 MPH). The customer can therefore play a significant role in reducing the camera door noise and actuation frequency.
LI47.50-P-078804
Service Bulletin/Repair Instructions
Complaint Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault codes in control units FSCM_GEN4/5/6 • For these fault codes, the tests contained in XENTRY must be carried out P046109 / P206609 / P13E600 • For these fault codes, the connector couplings/wiring harness routing must be checked for damage P206600 / P046100 Cause Various Remedy Carry out XENTRY tests for the listed fault codes in the FSCM (N118) and document the monitor graphics for the primary/ secondary lever-type sensors.
LI00.01-P-078887
Service Bulletin/Repair Instructions
Complaint The intent of this document is to provide workshops with helpful technical reference language. • Commonly used acronyms in LI's and TIPS cases. • Control unit names, numbers, and how to identify. • Network/wiring architecture groups to baumuster quick reference. • Platform to baumuster quick reference. Cause Information only Remedy Acronyms: • AV = Actual Values • CU = Control Unit • CUL = Control Unit Log • DTC = Diagnostic Trouble Code • E-Stand = Fresh-up head unit boot software (found in head unit control unit log) • FUP = Fresh-up • FW = Firmware • HSVL = High Speed Video Line • HU = Head Unit • HW = Hardware • ISU = Initial Start Up • LVDS = Low Voltage Differential Signal • NSFT = Not Safe For Transport • MOPF = Model Facelift (Ex: 167 MOPF) • PiH = Plug-in Hybrid • P3 Hybrid = AMG Plug-in Hybrid with rear drive unit • SA Code = Sonderausstattungscode (Option Code) • SCN = Software Calibration Number • SW = Software • TCU = Telecommunication Control Unit (Hermes/Ramses/Etc...) • QT = Quicktest • XD = XENTRY Diagnosis Control Unit Identification: Refer to the attachment "Control Unit Nomenclature" for location of each. • Control Unit Name • Control Unit Number • Control Unit Short name • Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family. Network/Wiring Architecture to Baumuster Quick Reference: Star 1 • 117, 156, 246 (MFA) • 166, 176, 221, 242, 246, 292 Star 2 • 205, 213, 238, 253, 257, 290 (MRA) • 117, 156, 246 (MFA) • 118, 177, 243, 247 (MFA2) • 167, 222, 292, 463, 465, 906 Star 3 • 294, 295, 296, 297 (EVA2) • 206, 214, 223, 236, 254 (MRA2) • 192 and 232 (MSA) • 907 Platform to Baumuster Quick Reference: MRA = "Mercedes-Benz Rearwheel Architecture": • 205 • 213 • 222 • 238 • 253 • 257 • 290 MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2": • 206 • 214 • 223 • 236 • 254 MFA = "Mercedes-Benz Frontwheel Architecture" 117 • 156 • 246 MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2" • 118 • 177 • 243 • 247 EVA1.5 = "Electric Vehicle Architecture" • 243 EVA2 = "Electric Vehicle Architecture - Generation 2" • 294 • 295 • 296 • 297 MSA = "Mercedes-Benz Sport Architecture" • 192 • 232 MMA = "Mercedes-Benz Modular Architecture" • No vehicles currently launched.
CL - Engine Thermostat
Other
On certain Model Year 2019 - 2023 C / E / G / GLC / GLE / GLS / GT/ S / SL - Class vehicles fitted with an eight-cylinder engine, the sealing ring in the engine thermostat could detach, causing a delay in the heating of the engine coolant. This may also cause the check engine Malfunction Indicator Lamp ('MIL') to illuminate.
LI42.10-P-063502
Service Bulletin/Repair Instructions
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy AMG brake systems are designed for high loads. This can result in noises under certain operating conditions and driving styles. Please refer to the Operator's Manual for further information such as care and maintenance instructions (washing vehicle directly after heavy use and using approved cleaning agents). These are dependent on speed, brake pressure or ambient conditions such as temperature and air humidity. 1. Beginning Diagnostics: a) Check whether, apart from this document, an additional document exists for the model series in question, and if so, work through it and then continue with1b. b) Check whether the complaint can be reproduced and at which axle or side the noises occur (ideally together with the customer while driving). c) Check the affected system for component wear, mechanical damage or localized overheating damage. 1. Replace damaged components as necessary and re-assess noise concern. d) Secure vehicle on a lift. 1. Start the engine and depress the brake pedal 3-4 times. 2. Check each wheel to see if they turn freely by hand. 3. If a wheel is not turning freely by hand, this needs to be addressed prior to re-assessing the noise concern. e) Assess condition of brake rotors and pads per WIS and visually (i.e. long periods of stagnation, etc...). 2. Specific Axle Work: NOTE: If brake pad has a metal backing plate, there is no need to affix the adhesive film. a) If the noises are coming from the front axle => Affix linings with adhesive film (see attachments for front axle). If backing plate is installed on pads, move to step 3. 1. Remove brake linings of front axle. 2. Clean all contact points on brake lining and brake caliper/carrier. 3. Clean bonding surface (where pistons contact back of brake pad). Apply adhesive film to the backplate of the piston-side brake lining. For 6 piston calipers, only in the area of the center piston. For other piston caliper configurations less than 6, apply where the piston(s) makes contact with the back of the pad. 4. Chamfer edges (round off sharp leading edges) on brake pads. See picture "Chamfered Pads". 5. After installing the brake linings, actuate the brake for 30 seconds. b) If the noises are coming from the rear axle => Affix linings with adhesive film and grease the lining as per the specification (see attachments for rear axle). 1. Remove brake pads of rear axle. 2. Cleaning all contact points on brake lining and brake caliper/carrier. 3. Grease contact points (red areas) between brake lining and guide of brake caliper with heat-resistant lubricating paste. 4. Clean bonding surface (where pistons contact back of brake pad). Apply adhesive film to the backplate of the piston-side brake lining. 5. Chamfer edges (round off sharp leading edges) on brake pads. See picture "Chamfered Pads". IMPORTANT: Be absolutely certain to not allow paste between friction surfaces of the pad and disc! 3. Brake Bedding Process: a) Before trip, the mileage incurred must be clarified with the customer (approx. 30 miles). b) Select a suitable route so speeds of approximately 65 MPH can be achieved. c) Brake the vehicle 15 times with a brake pressure of approx. 30 bar (have the passenger read it out using XENTRY) from 62 MPH to 30 MPH (no emergency stops and no braking in the ESP control range). Maintain a cooling distance of approx. 1 mile between brake applications. d) Finally drive approx. 3 miles to allow the system to cool. e) Reassess noise.
EW - Engine Thermostat
Warranty Program/Extension
This NCU supersedes the prior NCUs issued on December 1, 2023 and February 06, 2024 and includes additional MY 2019 AMG G63 vehicles. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the engine thermostat (including software update) installed in certain Model Year (“MY”) vehicles (with engines M176, M177, M178) listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles (whichever occurs first), due to the following condition In the affected vehicles, the sealing ring in the engine thermostat could detach, causing a delay in the heating of the engine coolant. This may also cause the check engine Malfunction Indicator Lamp (‘MIL’) to illuminate.
LI88.60-P-072093
Service Bulletin/Repair Instructions
Complaint Fuel door may require several attempts to open. Please note that if the complaint "Fuel filler flap not opening" occurs, it is important to check the fuel filler flap before replacing the central locking actuator. For gasoline hybrid vehicles where the fuel filler flap fails to open or does so but slowly, observe the document "Fuel filler flap fails to open or does so but slowly on plug-in HYBRID gasoline vehicles"! Cause Central locking actuator may have an electrical fault and may not open. Remedy 1. Car locked: To rule out incorrect operation, operate the fuel filler flap in the area shown in Fig. 1 and listen out for the clicking noise of the microswitch in the central locking actuator. If no clicking can be heard, continue with point 4. 2. Car unlocked: Press area on flap to start the microswitch clicking. Flap opens - show the customer the area to press. 3. Car unlocked: Flap cannot be opened regardless of which area you press. Open the flap by operating the emergency release for the CL actuator (through trunk, fender gap cover, etc, depending on specific vehicle) 4. Central locking actuator pressed directly, no clicking of microswitch, no electrical release of central locking actuator => Clicking of microswitch, electrical release of central locking actuator => Tank filler recess/charging recess not OK; report results via a TIPS case to B/C/E Inbox. 5. Replace central locking actuator; check function of new part before installing it: Do not dispose of damaged part. New central locking actuator does not release: More detailed examination of connector coupling, wiring harness, electrics required.
LI07.61-P-070707
Service Bulletin/Repair Instructions
Complaint The customer complains of a check engine light (CEL) on. May also complain of the engine running roughly and/or a loss of power. Cause Multiple Causes Remedy Please see the document "Remedy Instructions" in attachments. For MY19-24 G63 there may be an alternate solution available, please reference LI07.61-P-076755 before performing the steps in this LI for MY19-24 G63 vehicles.
LI35.30-P-058566
Service Bulletin/Repair Instructions
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).
LI82.85-P-078156
Service Bulletin/Repair Instructions
Complaint When using the offroad display in the MBUX, the "Transparent hood" function cannot be activated using the camera symbol. Cause MBUX FUP5 software: • E504.3 (A 297 904 97 00) • E504.4 (A 297 904 03 01) Remedy Update of head unit A26/17 to the new software: FUP5 opt. E505.4 (A 297 904 05 01)
LI46.15-P-078766
Service Bulletin/Repair Instructions
Complaint Play noticeable in the height adjustment of the steering column. See arrow direction in attached pictures. Cause Slipped thrust bearing ring on the height adjustment. Remedy Install repair kit for height adjustment of the steering column. For tightening torque, see attachment.
LI82.85-P-078722
Service Bulletin/Repair Instructions
Complaint The vehicle's position on the map is displayed far away from its actual position, e.g. the vehicle is displayed as being in the middle of the ocean. Note: In the quick test, no relevant DTC is displayed for this. Cause The GNSS antenna is not correctly inserted at the GNSS connection (see picture in the attachment) in the head unit (A26/17). Remedy Insert the connector into the GNSS connection and ensure that the connector has engaged correctly and is fully seated.
LI82.85-P-068986
Service Bulletin/Repair Instructions
Complaint <p> After a software update, the MBUX multimedia system (A26/17) may incorrectly display the fault code B19C804 "Software tampering has been detected. There is an internal fault". </p> <p> </p> <p> Note: If there are no relevant customer complaints, then the DTC can be ignored as it does not directly affect functionality. If there is a customer complaint in addition to the above DTC, further diagnostic measures must be performed. </p> Cause The current software release of the MBUX multimedia system (A26/17) Remedy <p>Update the A26/17 to newest available software release.</p><p> </p><p>Note: Do not replace any parts.</p>