TL* THE CONTACT OWNS A 2015 JEEP GRAND CHEROKEE. AFTER PARKING ON A SLIGHT INCLINE AND EXITING THE VEHICLE, IT SUDDENLY BEGAN TO ROLL BACKWARDS. THE CONTACT WAS ABLE TO GET BACK INTO THE VEHICLE AND APPLY THE BRAKES TO STOP. THE VEHICLE EXPERIENCED A SECOND INCIDENT WHILE PARKED ON AN INCLINE WHERE IT ROLLED FORWARD DOWN A SLIGHT INCLINE AND CRASHED INTO A BUILDING. A POLICE REPORT WAS FILED AND THERE WERE NO INJURIES. THE CAUSE OF THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 1,500.