HomeLI15.40-P-077947 · MERCEDES-BENZ
MERCEDES-BENZ

LI15.40-P-077947

Manufacturer communications

Publication date
2025-08-09
Received by NHTSA
2025-08-15
NHTSA record numbers
11021892

Manufacturer summary

Original wording in English

Complaint Combustion engine could no longer be started, only electric driving possible Cause High-voltage belt-driven starter-alternator defective Remedy Requirement: Before carrying out test work, it must be ensured that the person performing the work has successfully completed the required qualification for work on the high-voltage system. Note: In order to check whether the high-voltage belt-driven starter-alternator is defective, please carry out the test below. If the fault "P0E2F00 The electrical fuse B for the high voltage has a malfunction" is stored in the N82/10 BMS control unit, the HV protocol must be checked to see whether the fuse for the auxiliary consumers is defective. In this case, the high-voltage battery must be replaced after the short circuit has been eliminated. (See attachment) The defective high-voltage belt-driven starter-alternator must always be sent back via the existing return delivery process for analysis. Check: Please disconnect the high-voltage plug at the high-voltage belt-driven starter-alternator and connect test adapter 000 589 94 63 00. Measure resistance HV+ to HV-. If the final measurement result is between 0–1 ohm, the high-voltage belt-driven starter-alternator with the short circuit must be replaced. If either one of or both the fault codes P0C0B16 and P0C0B17 are saved in the high-voltage belt-driven starter-alternator control unit G2/3, please replace the high-voltage belt-driven starter-alternator, since no short circuit can be measured here and this therefore concerns a hardware defect. Please check the serial number on the silver adhesive label below the SW number on the front of the high-voltage belt-driven starter-alternator. Example: 2314300044 (the first 10 digits, see attachment) Important note: If the number is greater than 2329100027, a TIPS case must be created. In this instance, please attach the following documents to the TIPS case:
• Quick test
• High-voltage event log
• Picture of the silver adhesive label on the front of the high-voltage belt-driven starter-alternator (serial number)
• Attach the measurement results with pictures

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Reported code forms

Check vehicle applicability

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

MakeModelModel year
Mercedes-BenzAMG C63 S E2024
Mercedes-BenzAMG GLC63 S E2025
Mercedes-BenzAMG GT63 S E2025
Mercedes-BenzAMG S 63 E 4MATIC+2025
Mercedes-BenzAMG S 63 E 4MATIC+2024
Mercedes-BenzAMG SL63 S E2025

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