The sunroof on my 2013 Mercedes Benz glk 350 spontaneously exploded with no warning. Nothing hit the roof or any other part of the car. The weather was about 36 degrees Fahrenheit, not too cold, not too hot. There was a loud bang (like the sound of a gunshot) followed by 5 - 10 minutes of crackling as the sunroof glass broke into hundreds of pieces. It appears to be the top layer of double-paned glass, as the glass did not fall into the car. I was driving about 35 mph at the time. There was nothing unusual that would have caused this.

- Highlands Ranch, CO, USA