I was driving in the Rocky Mountains and head what sounded like a gun shot. I pulled over to inspect the vehicle and found that my moonroof had exploded. I was not behind any cars or trucks so I know it was not caused by a rock. I took the car into Audi where they told me it was a known issue. A few days later Audu said it was not going to be covered with warranty and we were responsible for the damages. I have found multiple forums thay show this is a known issue and that audi fails to inform their customers about the serious safety risk.