I WAS DRIVING ON THE TOLLWAY WHEN MY CAR BEGAN TO OVERHEAT. I TURNED ON THE HEATER TO MAXIMUM AND DROVE AT ABOUT 55 MPH. ABOUT ONE MILE FROM HOME ANOTHER CAR PULLED ALONG SIDE TO TELL ME THAT THERE WERE FLAMES COMING FROM UNDERNEATH MY CAR. I IMMEDIATELY PULLED OVER BUT COULD NOT STOP IMMEDIATELY AS I LOST ALL POWER AND HAD NO BRAKES. SINCE THE EXIT WAS ON AN INCLINE I WAS ABLE TO COAST TO A STOP AND MY WIFE AND I EXITED THE CAR. WITHIN LESS THAN 10 SECONDS AFTER WE EXITED THE CAR WAS ENGULFED IN FLAMES AND WAS TOTALED. *NM