While driving, the panoramic sunroof on my 2020 Mercedes-Benz CLA250 4MATIC shattered unexpectedly while fully closed. The interior sunshade was also closed at the time. There was no prior damage and no discernible impact. I did not observe or hear anything strike the vehicle. The fracture pattern shows no identifiable point of origin or impact and appears irregular and multi-directional, which is inconsistent with external debris. This appears to be a spontaneous tempered glass failure and raises safety concerns due to the risk of injury to occupants and driver distraction while operating the vehicle.
- NHTSA ID
- 11728141
- Incident
- Mar 30, 2026