NHTSA Service Bulletin 11005286: 2020-2024 Mercedes-benz Amg C43
Official manufacturer communication context for 2020-2024 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.
Complaint Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant systemRemedy Please refer to the specific repair instructions for the vehicle you are working on in the attachments section of this LI. Before beginning work on the vehicle open a TIPS case and request the tool you will need. In your request include a contact name, phone number, and shipping address for the tool to be sent. Before the tool arrives: Remove and replace the coolant expansion tank (reservoir) and the main radiator. Without removing the components: flush the heater core and changeover valve (located in the right front wheel arch) in the opposite direction of flow until no debris remains. Once the tool arrives, proceed with flushing the vehicle per the instructions attached in this LI. A picture of the filter after each flush must be taken. If after the prescribed number of flushing attempts debris is still being collected in the filter, upload all the pictures to the TIPS case and wait for next steps. A scale of not-acceptable to acceptable debris level in the filter is in the attachments for you to make an assessment as well.
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 11005286?
Complaint Customer states that the CEL is lit in the instrument cluster Cause Debris in the coolant systemRemedy Please refer to the specific repair instructions for the vehicle you are working on in the attachments section of this LI. Before beginning work on the vehicle open a TIPS case and request the tool you will need. In your request include a contact name, phone number, and shipping address for the tool to.
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.
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