The panoramic glass of the sunroof exploded out while driving on the freeway. A large piece of the glass exploded outwards and could not be retrieved. It was not damaged by external impact as other cars were not close enough to kick back rocks, debris, etc. The sunroof glass had no damage prior to shattering. Hazard lights were turned on to drive to the nearest exit, and subsequent accident happened when a speeding vehicle crashed into my vehicle. This happened on the freeway driving 75 mph causing a road hazard, the glass that shattered out could have hit vehicles behind my vehicle, causing damage or a crash. The vehicle has not been inspected by the dealership or insurance company as of yet. There were no warning signs or symptoms of failure.