EXITING CAR WASH (WASH RACK) ONTO PAVEMENT, SHIFTING FROM NEUTRAL TO DRIVE WITH FOOT ON BRAKE PEDAL, CAR LURCHED FORWARD WITH INABILITY TO STOP WITH 4 WHEEL DRIVE FULLY ENGAGED WITHOUT DRIVER INITIATING. FAILURE IN BOTH BRAKING MECHANISM AND 4 WHEEL DRIVE CONTROL SYSTEMS CAUSING LOSS OF CONTROL OF VEHICLE WHILE IT ACCELERATED UNTIL STOPPED BY TURNING OFF IGNITION. *AK