2010 BMW 5 SERIES Structurebody Problems

I WAS TRAVELING ON FREEWAY TO THE AIRPORT WHEN MY WIFE AND I HEARD A LOUD BOOM AND SUDDENLY HEARD LOUD AIRFLOW. I PULLED OFF TO SIDE OF ROAD AND INSPECTED CAR. THE SUNROOF HAD EXPLODED AND SHATTERED. THE CAR TRAVELING BEHIND ME ALSO STOPPED TO INSPECT HIS VEHICLE BECAUSE OF FLYING GLASS. THE CABIN DOOR TO THE SUNROOF HAD LUCKILY HAD BEEN CLOSED SO AS MY WIFE AND I AVOIDED THE FLYING GLASS. WHEN WE RETURNED FROM OUR TRIP I TOOK VEHICLE TO DEALER, THE VEHICLE WAS UNDER WARRANTY. THE DEALER SAID THIS PART WAS NOT COVERED AND WOULD COST $3600 TO REPAIR. WE GOGGLED BMW5 SERIES EXPLODING SUNROOFS AND DISCOVERED WE WERE NOT THE ONLY ONES TO EXPERIENCE EXPLODING SUNROOFS. SURELY BMW KNOWS ABOUT THIS POTENTIALLY GRIEVOUS PROBLEM. WE CALLED BMW NORTH AMERICA AND FILED A COMPLAINT WITH THE RESOLUTION DEPARTMENT. THE NEXT DAY BMW TO MY CHAGRIN...