Picked up a M3 on Friday. Was out of town for easter, so the car was sitting idle for 4-5 days parked outside in California, besides a lot of pollen there was no extreme temps during this period. When got in the car this morning, there is a 14" long crack in the sunroof. I used one of the detailed delivery check-lists and I explicitly looked for stress fractures in the roof and everything was fine. So far impressed with support. Have a drop off appointment 2pm tomorrow.