NHTSA service bulletin

NHTSA Service Bulletin 11027861: 2024-2026 Mercedes-benz Amg Glc43

Official manufacturer communication context for 2024-2026 Mercedes-benz Amg Glc43, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 11027861 summary graphic for 2024-2026 Mercedes-benz Amg Glc43
11027861NHTSA document ID
Manufacturer communicationcommunication type
4affected 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 Harsh 1-2, 2-3, and/or 3-4 shift Jerky shifting Jolting when accelerating from stop Cause Insufficient software application causing elevated K81/K27/B05 fill time adaptations and elevated torque adaptations for concerning shift. Remedy As of 1/28/2026 the resolution software has been released. Please ensure your Xentry machine is up to date with the latest Add Ons and continue with the following steps: Note: ALL steps must be performed to rectify concern 1. Perform software update for VGS control unit (A 001 902 20 34) 2. Check transmission oil level and correct, if necessary (transmission oil temperature > 60 C) 3. Perform Xentry Valve Flushing procedure at least 3x 4. Perform a standstill adaptation, then read out new EEPROM data 5. Perform driving adaptation(s) while adhering to the below parameters for at least 20-30 miles until the shift quality improves. Note: There is no menu in Xentry for this procedure. We recommend displaying the torque in the instrument cluster. If all below parameters are met at the time the shift, a driving adaptation will automatically occur. Harsh 1-2 Perform a driving adaptation of 4-5 (adapts K81 for the 1-2 shift) Harsh 2-3 Perform a driving adaptation of 2-3 (adapts B05 directly) Harsh 3-4 Perform a driving adaptation of 3-4 (adapts K27 directly) - Level track (no incline/decline) - Slippery drive program - Display the torque in the instrument cluster: The torque must be between 100 and 250 Nm (about 184 ft lbs), preferably closer to the maximum torque - Constant engine torque - Engine speed below 2500 rpm - Do not shift via paddle If the vehicle returns and already has the updated software, please submit a TIPS case to the Powertraininbox and ensure the following is included: - Initial Quick Test w/ Freeze Frame Data - VGS Control Unit Log - Initial EEPROM (before any adaptations or Xentry procedures were performed) - Detailed vehicle history of the complaint

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 Glc43 4matic2024-2026Ask for service records and run the exact VIN before purchase.
Mercedes-benzAmg Glc43 4matic Coupe2024, 2025Ask for service records and run the exact VIN before purchase.
Mercedes-benzGlc43 4matic Coupe2026Ask 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 11027861?

Complaint Harsh 1-2, 2-3, and/or 3-4 shift Jerky shifting Jolting when accelerating from stop Cause Insufficient software application causing elevated K81/K27/B05 fill time adaptations and elevated torque adaptations for concerning shift. Remedy As of 1/28/2026 the resolution software has been released. Please ensure your Xentry machine is up to date with the latest Add Ons and continue with the following steps:.

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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