Mercedes-Benz AMG GLC43 2023–2026 — technical service bulletin

Bulletin LI91.29-P-079178 · NHTSA communication 11031205 · issued Apr 8, 2026

Technical service bulletin

communication type

Seats

component

2023–2026

model years

vehicle entries

Official summary

Complaint After opening the driver's door, the seat can no longer be moved using the Memory button. Adjustment via the seat adjustment switch is still possible. Example: Driver 1 parks the vehicle in the evening and the seat position is right to the front with Memory button 1. Driver 2 opens the driver's door and presses Memory button 2, as seat position 1 is too far forward to get in. The seat does not move to the saved rear seat position 2. Once the ignition is turned "on", the function is available again. Cause The cause is an error in the HU7 software. Remedy Please perform a software upda

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.