TL* THE CONTACT OWNS A 1999 FORD F-150. WHILE THE VEHICLE WAS SHUT OFF AND UNOCCUPIED, IT ROLLED DOWN A HILL AND CRASHED INTO A TREE. THE EXHAUST WARNING INDICATOR ILLUMINATED. THE AIR BAGS DID NOT DEPLOY. THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE. THE LOCAL DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AND PROVIDED CASE NUMBER: CAS16599291. THE CONTACT WAS REFERRED TO NHTSA. THE FAILURE MILEAGE WAS 271,000.