Vehicle report
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.
LI54-15-P057373
XENTRY (MERCEDES): THE FUSE AND RELAY BOXES (SRB) IN ENGINE COMPARTMENT OR REAR COMPARTMENT HAS A MALFUNCTION AND DISRUPTIONS TO COMMUNICATION PATHS CAUSING A NO START IN VEHICLE. MODEL 2012-2013 204, 207, 212, 218, 231, 246, 176, 117, 172. *PE
SCB-2013090008
MERCEDES: SOFTWARE FAILS TO CORRESPOND, ON SOME VEHICLES, TO CURRENT PRODUCTION CONFIGURATION. MODEL 2013 166 (ML), X166 (GL), 204 (C), X204 (GLK), 207 (E-COUPE), 212 (E), 218 (CLS), 231 (SL). *PE
SC-2013010001
MERCEDES: DUE TO LEFT AND RIGHT SECONDARY CHAIN TENSIONERS, OF THE CHECK VALVE, BEING INSTALLED AND PRESSED DEEPLY INTO CYLINDER HEADS, THE OIL SUPPLY CAN NOT BE ENSURED FOR CYLINDER HEAD, AND CHECK VALVE, OF LEFT AND RIGHT SECONDARY CHAIN TENSIONERS, MUST BE REMOVED. MODELS 2013 207(E350, 550), 212 (E350, 550, 63), 218 (CLS550, 63), 221(S550, 600, 65, 63, 400, 450, 350), 231 (SL). *PE
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.