VEHICLE SPONTANEOUSLY CAUGHT FIRE WHILE STUCK IN SNOW DRIFT. FIRE WAS ALL CONSUMING - FIRE TRUCK HAD TO COME OUT IT OUT - JUST SHELL OF VAN WAS LEFT. WE WERE ABLE TO GET OUT AS FIRE WAS SLOW TO TAKE OFF. FIRE STARTED IN ENGINE COMPARTMENT. FIRE CHIEF SAID WE WOULD NEVER KNOW CAUSE AS NO ENGINE COMPARTMENT REMAINS. *TR