# Service bulletin LI77.21\-P\-075806

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: 11031507
- Published by NHTSA: 2026\-04\-22
- Manufacturer's number: LI77.21\-P\-075806
- Manufacturer's date: 2026\-04\-20
- NHTSA component: VISIBILITY/WIPER

## NHTSA's summary

Complaint The sliding sunroof glass panel of the panoramic roof reverses during the closing process, either once or multiple times, without an entrapment \(anti‑pinch\) event being detected. The concern may occur temporarily or repeatedly during normal closing operation. Cause The automatic reversing function of the panoramic roof is overly sensitive due to parameterization in combination with seal counter‑pressure. This condition can cause the roof to reverse even though no obstruction is present. Remedy Retrofit the vehicle to meet Cleanpoint status “Panoramic sliding sunroof glass panel reverses during closing without a pinch event.” The retrofit includes: • Hardware modification \(installation of a cover rail / EPDM lip\) • Corresponding software update for the panoramic roof control unit The prescribed retrofit steps must be performed in the specified sequence as outlined in this document. 1\) Retrofit the EPDM lip onto the rear edge of the panoramic sliding roof panel: • Clean the underside of the rear edge of the sliding sunroof panel \(marking, Figure 1\) \(e.g., isopropanol\). • Subsequently install the cover rail on the underside of the sliding sunroof panel \(Figure 2\). \- Distance from the cover rail to the rear edge of the sliding sunroof panel A = 5 mm \- Distance from the cover rail to the right and left edges of the sliding sunroof panel B = 9 mm \- Apply firm pressure by hand along the entire bonding surface of the COVER RAIL \- The wider flange at the ends of the cover rail \(see Figure 3\) must point in the direction of travel 2\) Submit an XSS Ticket with the following requests to add SA code O75 to the Vehicle Data Card • Enter code "O75" \(Oscar 75\) in Vehicle Documentation System \(Vedok\): • Add the following AO text to KG 78: AO code O75 added as specified in LI77.21\-P\-075806 \(Version 7\). 3\) Install new software from the panoramic roof control unit \(TSSR296, A98, PSD\) and teach in the anti\-pinch protection again: • Connect XENTRY Diagnosis. \- always use the current XENTRY Diagnosis software release with all available add\-ons. \- Strict compliance with the operation steps in XENTRY Diagnosis is absolutely essential\! \- Ensure adequate power supply to the vehicle's on\-board electrical system battery \(greater than 12.5 V\) using a battery charger. • Commission the panoramic roof control unit \- To do this, select "A98 – control module 'panoramic sliding sunroof' → adaptation → commissioning → Commission the control unit." \- Then follow user guidance in XENTRY Diagnosis. • Disconnect XENTRY Diagnosis.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031507-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031507-9999.pdf)

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

## Components

Glass, wipers and mirrors, Wipers and washers

## Vehicles listed

- 2007 to 2009 MERCEDES BENZ ML320
- 2006 to 2009 MERCEDES BENZ ML350
- 2006 to 2007 MERCEDES BENZ ML500
- 2008 to 2009 MERCEDES BENZ ML550
- 2007 to 2009 MERCEDES BENZ ML63
- 2006 to 2009 MERCEDES BENZ SLK280
- 2009 MERCEDES BENZ SLK300
- 2005 to 2009 MERCEDES BENZ SLK350
- 2005 to 2009 MERCEDES BENZ SLK55
- 2024 MERCEDES\-BENZ AMG EQE SUV 4MATIC
- 2007 to 2011 MERCEDES\-BENZ AMG ML63
- 2023 to 2024 MERCEDES\-BENZ EQE SUV 350 4MATIC
- 2023 to 2024 MERCEDES\-BENZ EQE SUV 350\+
- 2023 MERCEDES\-BENZ EQE SUV 500 4MATIC
- 2023 MERCEDES\-BENZ EQS SUV 450 4MATIC
- 2023 to 2024 MERCEDES\-BENZ EQS SUV 450\+
- 2023 MERCEDES\-BENZ EQS SUV 580 4MATIC
- 2010 to 2011 MERCEDES\-BENZ ML320
- 2010 to 2011 MERCEDES\-BENZ ML350
- 2010 to 2011 MERCEDES\-BENZ ML450
- 2010 to 2011 MERCEDES\-BENZ ML550
- 2010 to 2011 MERCEDES\-BENZ ML63

JSON: [/v1/bulletins/11031507](/v1/bulletins/11031507)

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