# Other CL \- 2025040001

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: Other
- NHTSA id: 11029134
- Published by NHTSA: 2026\-03\-02
- Manufacturer's number: CL \- 2025040001
- Manufacturer's date: 2026\-02\-20
- NHTSA component: ELECTRICAL SYSTEM; ENGINE

## NHTSA's summary

Mercedes\-Benz AG, the manufacturer of Mercedes\-Benz vehicles, has decided that on certain model year 2023 C\-Class, G\-Class and SL vehicles, the engine control unit software may not meet current specifications. Our records indicate that your vehicle is included in the affected population. What is the issue? The diagnosis routine for monitoring the engine’s air\-fuel ratio might not be activated as intended and a malfunction in the oxygen sensor could be erroneously detected causing the check engine Malfunction Indicator Lamp \(‘MIL’\) to illuminate. What will your Mercedes\-Benz Dealership do? An authorized Mercedes\-Benz dealer will update the engine control unit software. This vehicle repair will be provided at no cost to you. While the repair time can be less than one hour, your dealer can provide you with a better estimate of the overall time for this visit. As a matter of normal service process, the authorized Mercedes\-Benz dealer will also check for other repair measures that might be applicable to your vehicle, which may increase the required working time. You will not be charged for other services or repairs unless so requested. Steps to take. • If you have not already had your vehicle repaired for this recall, find your nearest authorized Mercedes\-Benz dealer at www.mbusa.com/recall to schedule your recall repair. • Please mention you are scheduling an appointment for Mercedes\-Benz recall 2025040001 \(CA DMV \# 250401\). • You may be asked for your VIN, which for your convenience is located at the top of this letter.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029134-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029134-9999.pdf)

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

## Components

Electrical system, Engine

## Vehicles listed

- 2023 MERCEDES\-BENZ AMG C43
- 2023 MERCEDES\-BENZ AMG C43 4MATIC
- 2023 MERCEDES\-BENZ AMG C63 S
- 2023 MERCEDES\-BENZ AMG C63 S E
- 2023 MERCEDES\-BENZ AMG G63
- 2023 MERCEDES\-BENZ AMG SL43
- 2023 MERCEDES\-BENZ AMG SL55
- 2023 MERCEDES\-BENZ AMG SL55 4MATIC\+
- 2023 MERCEDES\-BENZ AMG SL63
- 2023 MERCEDES\-BENZ AMG SL63 4MATIC\+
- 2023 MERCEDES\-BENZ C 300
- 2023 MERCEDES\-BENZ C 300 4MATIC
- 2023 MERCEDES\-BENZ G 550

JSON: [/v1/bulletins/11029134](/v1/bulletins/11029134)

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