Mercedes-Benz AMG GLC43 2020–2025 — technical service bulletin
Bulletin LI77.21-P-075807 · NHTSA communication 11013336 · issued Jan 23, 2025
Technical service bulletin
communication type
Electrical System
component
2020–2025
model years
24
vehicle entries
Official summary
Complaint Sliding sunroof panel of panoramic sliding sunroof reverses (temporarily, once, multiple times) during closing process without entrapment event: a) from tilt position b) from sliding position Cause a) Sensitive parameterization of the automatic reversing function of the panoramic roof b) Sluggish operation through tolerances of various component parts in the roof mechanism, in particular, at higher temperatures Remedy a) Leave the sliding sunroof panel of the panoramic roof in the rear sliding position (fully open position) for at least 30 minutes (or overnight if necessary), then pe
Vehicles covered
- 2020 Mercedes-Benz AMG GLC43
- 2021 Mercedes-Benz AMG GLC43
- 2022 Mercedes-Benz AMG GLC43
- 2023 Mercedes-Benz AMG GLC43
- 2024 Mercedes-Benz AMG GLC43
- 2020 Mercedes-Benz AMG GLC63
- 2021 Mercedes-Benz AMG GLC63
- 2022 Mercedes-Benz AMG GLC63
- 2020 Mercedes-Benz AMG GLC63 S
- 2021 Mercedes-Benz AMG GLC63 S
- 2022 Mercedes-Benz AMG GLC63 S
- 2023 Mercedes-Benz AMG GLC63 S
- 2024 Mercedes-Benz AMG GLC63 S E
- 2020 Mercedes-Benz GLC 300
- 2021 Mercedes-Benz GLC 300
- 2022 Mercedes-Benz GLC 300
- 2023 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300 Coupe
- 2025 Mercedes-Benz GLC 300E
- 2020 Mercedes-Benz GLC 350
- 2020 Mercedes-Benz GLC 350 E
- 2021 Mercedes-Benz GLC 350 E
- 2025 Mercedes-Benz GLC 350 E 4MATIC
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.