Mercedes-Benz AMG EQS 2022–2023 — technical service bulletin
Bulletin LI77.21-P-074971 · NHTSA communication 10231033 · issued Jan 4, 2023
Technical service bulletin
communication type
Structure
component
2022–2023
model years
6
vehicle entries
Official summary
Complaint Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process without entrapment event. Cause 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. Further analyses: Information from the control unit log of the panoramic roof control unit (TSSR223) is still required in a TIPS case. Remedy Remedy: Normalize panoramic roof with diagnostic system and carry out teach-in run for automatic reversing function.
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.