# Service bulletin LI77.21\-P\-075807

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.

- Type: Service bulletin
- NHTSA id: 10231035
- Published by NHTSA: 2023\-02\-03
- Manufacturer's number: LI77.21\-P\-075807
- Manufacturer's date: 2023\-01\-20
- NHTSA component: STRUCTURE

## NHTSA's 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 unit log of the panoramic roof control unit \(TSSR254\) is required via a TIPS case. Remedy Further analyses Requirement: • The teach\-in run for the automatic reversing function of the panoramic roof via XENTRY has still NOT been carried out Please perform the following steps: 1. Create a TIPS case 2. Create control unit log of panoramic roof control unit \(TSSR223, A98, PSD\) \(prerequisite: add\-on 25071\) and attach to TIPS case Remedy Standardize panoramic roof with diagnostic system and carry out teach\-in run for automatic reversing function.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231035-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231035-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Body and frame

## Vehicles listed

- 2023 MERCEDES GLC
- 2023 MERCEDES\-BENZ GLC

JSON: [/v1/bulletins/10231035](/v1/bulletins/10231035)

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