NHTSA Service Bulletin 11009121: 2021-2024 Mercedes-benz Amg Eqs
Official manufacturer communication context for 2021-2024 Mercedes-benz Amg Eqs, 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.
Complaint Following the software update of the MBUX, the tablet can no longer be connected with the rear seat unit. The tablet cannot be used as usual. Cause The Android software of the tablet is not up to date and cannot communicate with the latest software of the MBUX. Remedy Remedy for Gen1 and Gen2: Update the Android software of the tablet (see instructions in attachment) and head unit A26/17 to the latest version. If the complaint continues to occur after this, please create a TIPS case. Note: Information for Gen1: The tablet's Android software update can be started via the device's system settings (see instructions in attachment). Information for Gen2: To access the device's system settings, the device must be removed from the vehicle and connected to an external Wi-Fi network. (See instructions in attachment).
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 11009121?
Complaint Following the software update of the MBUX, the tablet can no longer be connected with the rear seat unit. The tablet cannot be used as usual. Cause The Android software of the tablet is not up to date and cannot communicate with the latest software of the MBUX. Remedy Remedy for Gen1 and Gen2: Update the Android software of the tablet (see instructions in attachment) and head unit A26/17 to the latest.
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