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Service bulletin LI91.29-P-079178

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11031205
Published by NHTSA2026-04-09
Manufacturer's numberLI91.29-P-079178
Manufacturer's date2026-04-08
NHTSA componentSEATS

NHTSA's 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 update in the HU7 control unit and then carry out a factory reset of the HU7.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Seats

Vehicles listed
MERCEDES-BENZ AMG GLC432024
MERCEDES-BENZ AMG GLC43 4MATIC2024 to 2026
MERCEDES-BENZ AMG GLC43 4MATIC COUPE2024 to 2025
MERCEDES-BENZ AMG GLC63 S E2025
MERCEDES-BENZ AMG GLC63 S E 4MATIC+2025 to 2026
MERCEDES-BENZ AMG GLC63 S E 4MATIC+ COUPE2025 to 2026
MERCEDES-BENZ GLC 3002023 to 2026
MERCEDES-BENZ GLC 300 4MATIC2023 to 2026
MERCEDES-BENZ GLC 300 4MATIC COUPE2024 to 2026
MERCEDES-BENZ GLC 300 COUPE2024
MERCEDES-BENZ GLC 350 E 4MATIC2025 to 2026
MERCEDES-BENZ GLC43 4MATIC COUPE2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.