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Service bulletin LI77.21-P-074971

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 id11008875
Published by NHTSA2024-10-09
Manufacturer's numberLI77.21-P-074971
Manufacturer's date2024-10-03
NHTSA componentSTRUCTURE:BODY; VISIBILITY/WIPER

NHTSA's summary

Complaint Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process without entrapment event. Cause It is not possible to save the relearning process for force progression after each actuation. A, e.g. mechanical sluggishness caused by aging cannot be compensated for here. Remedy Perform commissioning of panoramic roof control unit (PSD, A98, TSSR223). Reference to escalation closing during reversing processes (also described in Operator’s Manual), if vehicle in customer possession (see Video_1): If the panoramic roof blocks up when closing and then opens again slightly (reversing process): Immediately after automatic reversing, wipe forwards on the control panel of the overhead control panel and hold until the panoramic roof is closed. The panoramic roof is closed with greater closing force. If the panoramic roof blocks up again and then opens again slightly (reversing process): repeat previous step. The panoramic roof is closed again with greater closing force.

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, Wipers and washers

Vehicles listed
MERCEDES-BENZ AMG C432023
MERCEDES-BENZ AMG EQE2023
MERCEDES-BENZ AMG EQS2022 to 2023
MERCEDES-BENZ AMG EQS 532022 to 2023
MERCEDES-BENZ AMG EQS 53 4MATIC2023
MERCEDES-BENZ C 3002022 to 2023
MERCEDES-BENZ EQE 350+2023
MERCEDES-BENZ EQE 5002023
MERCEDES-BENZ EQS 4502022
MERCEDES-BENZ EQS 450+2022 to 2023
MERCEDES-BENZ EQS 5802022 to 2023
MERCEDES-BENZ redundant EQE 350 4MATIC2023
MERCEDES-BENZ redundant EQS 4502023

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