PURCHASED A NEW FORD FIVE HUNDRED IN 2007. HAVE KEPT UP WITH ALL REGULAR MAINTENANCE. AFTER PUTTING ABOUT 20,000 MILES ON THE VEHICLE, I STARTED HAVING A PROBLEM WITH SUDDEN ACCELERATION. I WOULD COME TO A STOP AT AN INTERSECTION, MAILBOX, OR DRIVE-THRU AND LET MY FOOT OFF THE BRAKES AND THE CAR WOULD "JUMP" -- ACCELERATE ON ITS OWN. MY FOOT WOULD NOT EVEN BE ON THE GAS PEDAL. I TOOK IT TO THE FORD DEALERSHIP AND WAS TOLD THAT THE TRANSMISSION HAD TO BE "REPROGRAMMED". I SPECIFICALLY ASKED COULD IT BE A PROBLEM WITH FUEL SYSTEM AND WAS TOLD NO. I HAD THE WORK COMPLETED BUT THE PROBLEM PERSISTS TO THIS DAY. I HAVE HAD SEVERAL NEAR MISSES WITH REAR END COLLISIONS. FINALLY AS I WAS ENTERING A PARKING SPACE, THE CAR ACCELERATED ON ITS OWN AND HIT A POST IN FRONT OF THE PARKING SPACE.