With the car is stopped, ignition off, key out, the car will periodically lunge forward while in park. the lunge is always forward and within 5 minutes of turning car off. when i notified the dealer, they flashed new code to the on-board computer. the next time i informed the service department that it was still doing lunging, they stated this is "normal". about 3 months ago, i was knocked to the ground when the vehicle lunged forward. i was checking the oil at the time. *tr