CONSUMER WAS SITTING IN A DRIVE-THRU AND HAD PUT VEHICLE IN PARK WHEN IT EXPERIENCED SUDDEN ACCELERATION, CONSUMER STATES IT STARTED SHAKING AND MAKING A LOUD SQUEALING NOISE, THE BRAKES DID NOT WORK AND VEHICLE CRASHED INTO A CONCRETE GUARD POST, THE AIRBAGS DID NOT DEPLOY, CONSUMER SUFFERED A MILD CONCUSSION, FORD STATES THEY CAN NOT FIND ANY CAUSE FOR THE PROBLEM AND CAN NOT HELP CONSUMER ANY FURTHER. *SLC