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Service bulletin LI54.30-P-078529

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11036105
Published by NHTSA2026-08-11
Manufacturer's numberLI54.30-P-078529
Manufacturer's date2026-08-10
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Complaint During cold starting, a tortoise symbol may be displayed in the event of reduced engine output. For "non-hybrid vehicles", the thermostat symbol must be displayed. Cause Coding N133/1 IC Instrument cluster Remedy Perform N133/1 IC-Instrument-Cluster manual coding.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
MERCEDES-BENZ AMG C432023 to 2024
MERCEDES-BENZ AMG C43 4MATIC2023 to 2026
MERCEDES-BENZ C 3002022 to 2026
MERCEDES-BENZ C 300 4MATIC2022 to 2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.