NHTSA Service Bulletin 11029134: 2023 Mercedes-benz Amg C43
Official manufacturer communication context for 2023 Mercedes-benz Amg C43, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
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 engines 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.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 11029134?
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 engines air-fuel ratio might not be activated as intended and a.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
Get Full Report