1994 MERCEDES BENZ 420 — SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP

THE PROBLEM STARTED LAST AUGUST. IT OCCURRS ONLY OCCASIONALLY AND HAS NEVER BEEN DUPLICATED WHEN AT A DEALERSHIP OR REPAIR SHOP. AFTER APPLYING THE BRAKES AND COMING TO A STOP, THE CAR STARTS TO ROLL FORWARD. WHEN I TAKE MY FOOT OF THE BRAKE PEDAL AND REAPPLY IT, THE CAR THEN STOPS. HOWEVER, ON APRIL 7TH WHEN THIS OCCURRED REAPPLYING THE BRAKE DID NOT STOP THE CAR AND I ROLLED INTO THE REAR END OF A TRATOR TRAILER TRUCK WHO WAS STOPPED AT A RED LIGHT. IN NOVEMBER 2001 I TOOK THE CAR TO THE MERCEDES DEALERSHIP IN HAVERHILL, MA SMITH MOTORS. THEY PUT IN A NEW MASTER CYCLINDER. ON DECEMBER 24TH I EXPERIENCED THE SAME PROBLEM. SMITH MOTORS SAW THE CAR ON JAN 2, 2002 AND SAID UNTIL NEW ROTORS WERE PUT IN THEY COULD NOT DIAGNOSE THE PROBLEM. IN FEB I WAS IN DEVON, PA AND STOPPED IN THE MERCEDES DEALERAHIP THERE. THEY SAID WHEN A CUSTOMER EXPERIENCES THE PROBLEM I WAS HAVING THEY PUT IN NEW BRAKE SENSORS. (SEVERAL REPAIR SHOPS INCLUDING THE DEVON DEALERSHIP TOLD ME THINNING ROTORS WOULD NOT CAUSE THIS PROBLEM.) I HAD NEW ROTORS PUT IN, BUT EXPPERIENCED THE PROBLEM ON APRIL 7TH. THE CAR WAS TOWED BACK TO SMITH MOTORS AND THE REGIONAL MERCEDES REPAIR EXPERT EXAMED AND TESTED THE BRAKE SYSTEM FOR 3 HOURS AND SAID THERE WAS NO PROBLEM EXCEPT I NEEDED NEW ROTORS. THEY TOLD MY INSURANCE COMPANY EITHER I DIDN'T HAVE MY FOOT ON THE BRAKE OR THAT THE CAR IS OLD! I HAVE HAD NEW ROTORS PUT IN THE CAR BUT AM TERRIFIED OF DRIVING IT. PLEASE ADVISE. I CHECKED MY VIN NUMBER USING MY