SMELLED SMOKE AND THEN NOTICED CABIN OF CAR FILLING WITH SMOKE AS I WAS DRIVING HOME. MADE IT TO FRONT OF BUILDING WHERE I LIVE, GOT OUT OF CAR AND SAW SMOKE BILLOWING FROM TRUNK. OPENED TRUNK AND SAW FLAMES. CLOSED TRUNK. RAN INTO BUILDING, HAD CONCIERGE PUT OUT FIRE WITH FIRE EXTINGUISHER. AUSTIN FIRE DEPARTMENT SHOWED UP AFTER FIRE WAS EXTINGUISHED. AFD INCIDENT # 07086697. *TR