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Service bulletin LI77.21-P-075807

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 id10244745
Published by NHTSA2023-11-03
Manufacturer's numberLI77.21-P-075807
Manufacturer's date2023-10-02
NHTSA componentSTRUCTURE; VISIBILITY:SUN/MOON ROOF ASSEMBLY

NHTSA's summary

Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process without entrapment event. Sensitive parameterization of the automatic reversing function of the panoramic roof. Perform SW update of panoramic roof control unit (PSD, A98, TSSR254).

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

Body and frame, Glass, wipers and mirrors, Sunroof

Vehicles listed
MERCEDES-BENZ AMG GLC432020 to 2024
MERCEDES-BENZ AMG GLC632020 to 2022
MERCEDES-BENZ AMG GLC63 S2020 to 2023
MERCEDES-BENZ AMG GLC63 S E2024
MERCEDES-BENZ GLC 3002020 to 2024
MERCEDES-BENZ GLC 3502020
MERCEDES-BENZ GLC 350 E2020 to 2021

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