MERCEDES-BENZ

LI20.00-P-076708

2025-09-09 · NHTSA 11023049

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 Check engine lamp activated, coolant warning message, and engine fan running at full speed. Below fault codes stored in N127 PTCU related to LIN network components. U063200, U063287, U02A900, U02A987, U0698E4, U0698E5, U02C800, U02C887, U063B00, U063B87 Cause PTCU software, or physical layer fault in LIN bus circuit Remedy Model 254 (with version 22A) -Update software of PTCU N127 -Cleared fault codes and check vehicle operation Model 254 after update or with PTCU version later than 22A, or Model 167 -Check connections at all LIN bus components connected to N127 PTCU for damage, corrosion, or poor connection -Check wiring between LIN bus components and N127 for damage or chaffing -Inspect intermediate connections between LIN bus components and N127 for damage, corrosion, or poor connection No software change planned for model 167.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.