WHILE DRIVING ON THE HIGHWAY I DETECTED A BURNING SMELL. I SAW SMOKE COMING FROM UNDER MY LEGS. I LIFTED MY LEG AND SAW A GLOWING HEATING COIL IN THE SEAT. I TURNED OFF THE HEATED SEAT SWITCH AND PULLED TO THE CURB TO FURTHER CHECK OUT THE SITUATION. I REALIZED THE SMOKE/FIRE HAD STOPPED AND DROVE TO A PARKING AREA AND CHECKED THE SEAT AGAIN. THE DANGER SEEMED PAST SO I WENT TO DINNER. MY WIFE AND I RETURNED HOME WITH THE SEAT HEATER OFF. THE NEXT MORNING THE DEALER WAS CALLED AND THE CAR TAKEN TO THE SERVICE CENTER. *TR