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TSB: MERCEDES AMG GLC43, AMG GLC63, AMG GLC63 S, AMG GLC63E S, GLC, GLC300, GLC350, GLC350E, GLC63 (2020–2024)

Bulletin LI77.21-P-075807 — January 20, 2023

Bulletin Details

Bulletin IDLI77.21-P-075807
ManufacturerMERCEDES
ModelsAMG GLC43, AMG GLC63, AMG GLC63 S, AMG GLC63E S, GLC, GLC300, GLC350, GLC350E, GLC63
Model Years2020–2024
Date IssuedJanuary 20, 2023
Date Added to NHTSANovember 2, 2023
ComponentVISIBILITY:SUN/MOON ROOF ASSEMBLY
Vehicles Affected46 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Complaint Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, or multiple times) during closing process, without entrapment event. Cause Cause remains open. For analysis, the information from the control uni

Affected Vehicles

MakeModelYearComponent
MERCEDES-BENZ AMG GLC43 2024 160000 STRUCTURE
MERCEDES-BENZ AMG GLC43 2024 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63E S 2024 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63E S 2024 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC300 2024 160000 STRUCTURE
MERCEDES-BENZ GLC300 2024 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC43 2023 160000 STRUCTURE
MERCEDES-BENZ AMG GLC43 2023 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 S 2023 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 S 2023 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC 2023 160000 STRUCTURE
MERCEDES GLC 2023 160000 STRUCTURE
MERCEDES-BENZ GLC300 2023 160000 STRUCTURE
MERCEDES-BENZ GLC300 2023 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC43 2022 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC43 2022 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 2022 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 2022 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 S 2022 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 S 2022 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC300 2022 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC300 2022 160000 STRUCTURE
MERCEDES-BENZ AMG GLC43 2021 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC43 2021 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 2021 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 2021 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 S 2021 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 S 2021 160000 STRUCTURE
MERCEDES-BENZ GLC300 2021 160000 STRUCTURE
MERCEDES-BENZ GLC300 2021 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC350E 2021 160000 STRUCTURE
MERCEDES-BENZ GLC350E 2021 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC43 2020 160000 STRUCTURE
MERCEDES-BENZ AMG GLC43 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 2020 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ AMG GLC63 S 2020 160000 STRUCTURE
MERCEDES-BENZ AMG GLC63 S 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC300 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC300 2020 160000 STRUCTURE
MERCEDES-BENZ GLC350 2020 160000 STRUCTURE
MERCEDES-BENZ GLC350 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC350E 2020 160000 STRUCTURE
MERCEDES-BENZ GLC350E 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY
MERCEDES-BENZ GLC63 2020 160000 STRUCTURE
MERCEDES-BENZ GLC63 2020 134000 VISIBILITY:SUN/MOON ROOF ASSEMBLY

Related MERCEDES Recalls

CampaignModelYearComponentSummary
E CLASS 1986 EXTERIOR LIGHTING SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES ...
E CLASS 1987 EXTERIOR LIGHTING SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES ...
E CLASS 1989 EXTERIOR LIGHTING SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES ...
E CLASS 1990 EXTERIOR LIGHTING SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES ...
E CLASS 1991 EXTERIOR LIGHTING SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES ...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MERCEDES dealer. Bring this bulletin ID (LI77.21-P-075807) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

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Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.

Back to All TSBs