I STARTED MY CAR, 98 BUICK RIVIERA, AND TURNED THE SEAT HEATER ON. I CAME BACK 5 MINUTES LATER AND STARTED DRIVING MY CAR TO WORK. ABOUT 4 MINUTES AFTER I LEFT MY HOUSE I STARTED SMELLING SMOKE LIKE SOMETHING WAS BURNING BUT I WAS VERY NEAR MY WORK SO I JUST KEPT GOING. AT WORK WHEN I STEPPED OUT OF MY CAR I NOTICED THAT THERE WAS A SMALL FIRE ON MY SEAT AND THAT MY LEATHER COAT WAS BURNING. I PUT OUT THE FIRE AND DISCONTINUED THE USE OF MY SEAT HEATER. *TR