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July 25, 2023 Service bulletin

Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during...

Mercedes-Benz technical service bulletin LI77.21-P-074971 for 2022-2023 Mercedes-Benz C300, 2023 Mercedes-Benz EQS 450 and 2022-2023 Mercedes-Benz AMG C43 and others.

Bulletin number
LI77.21-P-074971
Component
Structure
Summary
Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process without entrapment event. 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. The teach-in process does not properly save after each actuation. Note: Conditions such as slow operation of the sunroof due to aging of mechanical components cannot be compensated for during this process. Perform SCN Coding of panoramic roof control unit (PSD, A98, TSSR223).

Owners of these vehicles have filed 5 complaints in the body category.

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