Electrical system

Bulletin number

CL - 2025040001

Component

Electrical system

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.

Owners of these vehicles have filed 6 complaints in the electrical category.