NHTSA service bulletin

NHTSA Service Bulletin 11021143: 2020-2025 Mercedes-benz Amg Glc43

Official manufacturer communication context for 2020-2025 Mercedes-benz Amg Glc43, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 11021143 summary graphic for 2020-2025 Mercedes-benz Amg Glc43
11021143NHTSA document ID
Manufacturer communicationcommunication type
21affected 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 Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Test: Please perform the new SCN coding for HOSWD control unit (N179/1) (available since May 2025). Please flash the IDC (N62/4) software A223 902 75 37 (only applies to HOSWD223). Erase fault memory Remedy: Switch on ignition without touching the steering wheel. If after 10 seconds without touching the steering wheel, one of the two fault messages appears in the IC: Please check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). If there is visible damage -> replace steering wheel electronics or feed lines. If there is no visible damage -> Proceed to replace the steering wheel. If no yellow message appears in the instrument cluster within 10 seconds: Please grab the steering wheel all the way round, including the 6 o'clock chrome molding, with both hands (see picture 1). If the fault is triggered by grabbing the steering wheel rim or pressing on the 6 o'clock clasp, check contacts and feed lines in the steering wheel by means of visual inspection for damage, crimped connections, loose connections, etc. (example in picture 2 and 3). Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). If there is visible damage -> replace steering wheel electronics or feed lines. If no fault is visible -> Proceed to replace the steering wheel. In the event of a customer complaint and further fault code in HOSWD: B1E7713: Check ground connections (screw connections and cable to steering wheel rim); if necessary tighten screws/bolts and check for corrosion (Picture 4). B1F1F04: Check hand detection system control unit; if necessary swap with donor vehicle (ensure that the HW part numbers are identical).

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 Glc432024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Glc63 S E2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gle532021-2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gle63 S2021-2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gls632020-2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt432021-2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt532020-2023Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt552024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt632020, 2021, 2023, 2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Gt63 S2023Ask 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 Gt63s2020, 2021Ask for service records and run the exact VIN before purchase.
Mercedes-benzGlc 3002023-2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzGlc 300 4matic2023-2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzGlc 300e2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzGle 3502020-2024Ask for service records and run the exact VIN before purchase.
Mercedes-benzGle 350 4matic2024, 2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzGle 450 4matic2025Ask 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 11021143?

Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29.

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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