2009 Mercury Sable

HAVING DRIVEN 150 MILES OR SO OF HIGHWAY DRIVING USING CRUISE CONTROL, STOPPING TWO TIMES TO REST, DRIVING APPROX. 65 - 70 MPH. I ARRIVED AT WALTHAM ON RT. 128 WHERE THE TRAFFIC WAS BUMPER TO BUMPER. I HAD TO KEEP MY FOOT ON THE BRAKE UNTIL I WAS AT EXIT 38 OR 39. WE TRAVELLED 5 - 15 MPH. AFTER I WAS IN THE SLOW TRAFFIC FOR APPROX. 20 MINUTES MY CAR STARTED TO LURCH FORWARD WHILE GASSING UP AND WANTING TO JUMP AHEAD. MY FOOT WAS ON THE BRAKE AND I NEEDED TO BRAKE EVEN HARDER TO HOLD ONTO THE FORCE THAT THE CAR WAS EXERTING. I WAS IN BUMPER TO BUMPER TRAFFIC AND HAD KEPT A DISTANCE BETWEEH MYSELF AND THE CAR IN FRONT SO THE SMALL JUMP DID NOT HIT THAT CAR BEFORE I PUSHED HARDER ON THE BRAKE. THE SAME THING HAPPENED AGAIN WITHIN 5 MINUTES. ONCE I ARRIVED IN DANVERS I DROVE TO THE DEALER TO REPORT THE PROBLEM AND THEY GAVE ME AN APPOINTMENT FOR WEDNESDAY8/28/13. THIS SAME PROBLEM HAS BEEN HAPEENING SINCE I PURCHASED THE CAR IN 2011. IT SELF ACCELERATED RANDOMLY EVERY 3-4 MONTHS, IT HAPPENED WHEN I HAD MY FOOT ON THE BRAKE AND I WAS AT A TRAFFIC LIGHT WITH MY MOM IN THE CAR. I ALMOST WENT THROUGHT THE LIGHT FROM A STOPPED BRAKED POSITION. THE OTHER TIMES WERE AFTER DRIVING WITH CRUISE CONTROL WHICH I NEED. IT ALSO HAPPENED WHILE BRAKING TO GET INTO A PARKING PLACE. *TT