VEHICLE EXPERIENCED AN OCCURRENCE OF SUDDEN UNINTENDED ACCELERATION. I HAD MY FOOT ON THE BRAKE AND WAS EASING INTO A PARKING SPACE. ALL OF A SUDDEN, THE ENGINE REVVED, AND THE VEHICLE SURGED AND BEGAN TO MOVE FORWARD ON ITS OWN ACCORD. I WAS UNABLE TO STOP IT USING THE BRAKE. THE VEHICLE WENT OVER 2 PARKING CURBS AND SHRUBBERY AND WAS HEADED INTO TRAFFIC. VEHICLE WAS MOVING AT ABOUT 20-25 MPH SO I WAS ABLE TO STEER IT AND AVOIDED TRAFFIC BY TURNING RIGHT, STAYING ON PARKING LOT GRASS & ROCK BARRIER. CAR WENT INTO GULLY AND EVENTUALLY STOPPED ON ITS OWN. DEALERSHIP WAS UNABLE TO FIND PROBLEM. CONTACTED CORPORATE OFFICE WHO HAD VEHICLE INSPECTED BY AUTO ENGINEERING FIRM AND NO PROBLEM DETECTED. SINCE SOME RECURRENT ISSUES REPORTED ON SAFETY BOARDS, DECISION MADE TO TRADE IN VEHICLE. DEALERSHIP REPAIRED DAMAGE TO THE VEHICLE AND NOW HAS CAR UP FOR SALE; WE HAVE MANY CONCERNS ABOUT THIS VEHICLE BEING SOLD TO UNSUSPECTING CUSTOMER.