Mercedes-Benz AMG C43 2023 — technical service bulletin
Bulletin LI54.21-P-076055 · NHTSA communication 10233788 · issued Mar 15, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2023
model years
5
vehicle entries
Official summary
Complaint Check engine light activated Fault codes stored in AMG Drive Unit N145/1 (DRVU3) B1F9713 U015400 U188D00 Cause Timing variance on wakeup of ethernet control units Remedy A solution is in development for listed faults in AMG drive unit (DRVU3). Clear fault codes and perform 2 drive cycles allowing vehicle to sleep in between drives. If no fault codes or malfunctions occur, the vehicle can be released to the owner. Note: These fault codes will not lead to other malfunctions or damage to the vehicle.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.