EXITING FROM A PARKING LOT ONTO 7TH ST IN PHOENIX AZ, VEHICLE SUDDENLY ACCELERATED AND, DESPITE BRAKE APPLICATION, ENTERED THE ROADWAY, HITTING A MERCURY GRAND MARQUIS IN THE SIDE. NOBODY WAS INJURED AND AIRBAGS DID NOT INFLATE. ONCE STOPPED, IT WAS IMPOSSIBLE TO MOVE THE GEAR SHIFT FROM NEUTRAL INTO PARK TO RELEASE THE KEY. VEHICLE TOWED AND, AS FRAME WAS DAMAGED AS WELL AS FRONT END AND RADIATOR, INSURANCE ARE WRITING THE VEHICLE OFF. *TR