I HAVE A 2003 MERCURY MOUNTAINEER. I WAS STOPPED TO GET FUEL. I PUT MY SUV IN PARK TO GET OUT. I WAS LEAVING MY KEYS IN IT. WHEN I STEPPED OUT AND WALKED TO THE REAR, MY SUV STARTED ROLLING BACKWARDS. I HAD TO RUN BACK AN JUMP IN IT AND HIT THE BRAKE. I LOOKED AT THE GEAR SHIFTER AN IT DIDN'T GO INTO PARK. IT STOPPED IN THE MIDDLE OF P AND R. IF I HAD LOCKED THE DOORS I WOULD NEVER BEEN ABLE TO GET INSIDE BEFORE IT HIT THE FUEL PUMPS. IT HAS BEEN STOPPING AT THAT SPOT EVERY TIME I PUT IT IN PARK. *TR