TL*THE CONTACT OWNS A 2004 MERCURY MOUNTAINEER. WHILE THE VEHICLE WAS TURNED OFF, THE CONTACT'S TWO YEAR OLD SON GRABBED THE KEY AND PLACED IT IN THE IGNITION. HE ATTEMPTED TO START THE VEHICLE, BUT THE ENGINE NEVER IGNITED. THE CHILD THEN PROCEEDED TO PLACE THE SHIFTER IN EITHER NEUTRAL OR DRIVE AND THE VEHICLE BEGAN TO ROLL APPROXIMATELY 350 FEET DOWN A HILL. THE VEHICLE CRASHED INTO A BRUSH-HOG AND A HONDA VEHICLE BEFORE FINALLY COMING TO A STOP WHEN IT CRASHED INTO A BUILDING. THE CHILD SUSTAINED A CONTUSION AND LACERATIONS TO HIS HEAD, CHEST, AND LEGS. THE VEHICLE WAS TOWED AND IS CURRENTLY AT A SALVAGE YARD. THE POLICE STATED THAT EVEN THOUGH THE VEHICLE WAS NOT STARTED, THE GEARS WERE ABLE TO BE SHIFTED, WHICH SHOULD NOT HAVE OCCURRED. A POLICE REPORT WAS FILED. THE CONTACT BELIEVES THAT THE FAILURE WAS DUE TO A MANUFACTURER DEFECT AND THEY SHOULD BE HELD ACCOUNTABLE. THE SPEED WAS UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 59,000.