TL*THE CONTACT OWNS A 2002 LINCOLN TOWN CAR. THE CONTACT STATED THAT THE VEHICLE LUNGED FORWARD AND CRASHED INTO THE REAR OF ANOTHER VEHICLE. SHE WAS UNABLE TO STOP THE VEHICLE UNTIL ONE MINUTE LATER. THE MECHANIC AND DEALER WERE UNABLE TO DIAGNOSE THE CAUSE OF THE FAILURE. THE CURRENT AND FAILURE MILEAGES WERE 49,000.