DRIVING 2002 MERCEDES ML320. SMELLED BURNING. PULLED OVER AND CHECKED UNDER HOOD AND FOUND NO SMELL. WHEN I GOT BACK INTO THE CAR, I NOTICED A BURNED SPOT ON THE DRIVERS SEAT. CORRESPONDING BURN MARK WAS ON MY BACK LEFT PANT POCKET. I TURNED OF THE SEAT WARMER AND THE PROBLEM HAS STOPPED. *TR