WHILE PULLING INTO PARKING SPACE VEHICLE ACCELARATED AND CRASHED THROUGH WALL OF A DOCTORS OFFICE. VEHICLE STOPPED AFTER SHIFTING INTO PARK AND FRONT END WAS INSIDE BUILDING. HAD VEHICLE TOWED TO DEALER FOR INSPECTION. FOUND THROTTLE BODY STICKING WHICH MADE GAS PEDAL STICK CAUSING ENGINE TO ACCELARATE OUT OF CONTROL. DEALER FILED CLAIM WITH FORD. STILL WAITING FOR FORD TO RESPOND.