MERCEDES-BENZ

LI47.70-P-079912

2026-09-29 · NHTSA 11038189

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High‐voltage on board electrical system The following fault codes related to stuck contactor can be found in the High Voltage Control units : PTCU ‐ N127 (Powertrain control unit) • P154900 ‐ There is a warning due to overcurrent in the charging system of the high‐voltage electric circuit. • P154A00 ‐ There is a warning due to a detected crash event at standstill. • P154B00 ‐ There is a warning due to a stuck contactor. DCB223 ‐ N116/5 (Direct current charge connection unit) • P0E8929 ‐ The input current of the on‐board DC charging connection unit is too high. There is an invalid signal. • P2BC500 ‐ The contact ''Positive terminal'' of the contactor in the on‐board DC current charge‐connection unit is jammed closed • P2BCC00 ‐ The contact ''Negative terminal'' of the contactor in the onboard DC current charge‐connection unit is jammed closed. Instrument cluster warning messages : Cause • Current ripple due to EVSE (Electric Vehicle Supply Equipment) • Overcurrent or Overvoltage due to EVSE (Electric Vehicle Supply Equipment) • DCB contactors did not open immediately due to welding time at the end of DC charging Remedy • Check for a new software availability for DCCU (N116/5 ‐ Direct Current Charge connection Unit). If a new software is available, update the software first. • Reset contactor fault through special procedure without password. ( N116/5 >> Special Procedure >> Resetting of contactor fault.) Important Note : • Do not replace component DCB (N116/5) • If fault codes are not erasable, please raise a TIPS case and send it to HQ.

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