NHTSA service bulletin

NHTSA Service Bulletin 11029960: 2022-2026 Mercedes-benz Amg Gt43

Official manufacturer communication context for 2022-2026 Mercedes-benz Amg Gt43, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 11029960 summary graphic for 2022-2026 Mercedes-benz Amg Gt43
11029960NHTSA document ID
Manufacturer communicationcommunication type
16affected product rows
90/100quality score

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the Tailgate Control (HKS) control unit: P1CA000 & B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (232) or 01/27/26 (192): Update the HKS N121/1 control unit and perform SCN coding. If no new software is available, perform SCN coding. Vehicles with a production date 01/22/2026 (232) or 01/27/2026 (192) and later have already received the correct QNT from the factory.

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

MakeModelModel yearsBuyer note
Mercedes-benzAmg Gt432025, 2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt552024, 2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt55 4matic+2024-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt632024-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt63 4matic+2025, 2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt63 Pro 4matic+2025, 2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt63 S E2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt63 S E Performance 4matic+2025, 2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl432023-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl552022-2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl55 4matic+2023-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl632022, 2023, 2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl63 4matic+2023-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl63 S E2024, 2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Sl63 S E Performance 4matic+2024-2026Ask for service records and run the exact VIN before purchase.
Mercedes-maybachSl 680 4matic+2026Ask for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 11029960?

Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the Tailgate Control (HKS) control unit: P1CA000 & B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up.

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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