# 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.

- Type: Service bulletin
- NHTSA id: 11036105
- Published by NHTSA: 2026\-08\-11
- Manufacturer's number: LI54.30\-P\-078529
- Manufacturer's date: 2026\-08\-10
- NHTSA component: ELECTRICAL 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036105-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036105-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Vehicles listed

- 2023 to 2024 MERCEDES\-BENZ AMG C43
- 2023 to 2026 MERCEDES\-BENZ AMG C43 4MATIC
- 2022 to 2026 MERCEDES\-BENZ C 300
- 2022 to 2026 MERCEDES\-BENZ C 300 4MATIC

JSON: [/v1/bulletins/11036105](/v1/bulletins/11036105)

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