UNCONTROLLABLE VEHICLE ACCELERATION WHILE PULLING INTO PARKING SPACE AT APPROX 1 MPH. VEHICLE WAS UNABLE TO BE STOPPED WITH FULL BRAKE APPLICATION. VEHICLE STRUCK BUILDING, BOUNCED BACKWARD, STRUCK ANOTHER VEHICLE AND ENDED UP BACKWARD ON TOP OF A SNOW BANK. EXTENSIVE DAMAGE TO VEHICLE FRONT, SIDE ,REAR AND UNDERCARRIAGE. DUE TO SNOW CONDITIONS, VEHICLE CONTROL PROBLEMS COMPOUNDED. PRIOR TO REPAIR, VEHICLE WAS INSPECTED BY LEXUS "LEGAL REPRESENTATIVE. VEHICLE WAS REPAIRED BY LEXUS DEALER. LEXUS CORPORATION ISSUED 2 LETTERS STATING THAT THEY FOUND NOTHING WRONG WITH VEHICLE. OPERATOR ERROR WAS NOT CITED AS CAUSE. LEXUS CORPORATION WILL NOT RELEASE DETAILS OF VEHICLE INSPECTION CITING PROPRIETARY RIGHT. *TR