AFTER DRIVING FROM THE GROCERY STORE, I STOPPED AT A STORE AND LET MY GRANDDAUGHTER RUN IN FOR A COKE. WHILE SHE WAS INSIDE,I LET THE CAR IDLE. WITHIN 3 MINUTES, THE ENGINE COMPARTMENT WAS ON FIRE. NO WARNING LIGHTS CAME ON AND THE MOTOR NEVER GAVE ANY INDICATION OF A PROBLEM. THE PEOPLE IN THE PARKING LOT TOLD ME TO GET OUT OF THE CAR ,IT WAS ON FIRE, I CUT OFF THE CAR , POPPED THE HOOD AND THEN STARTED TO OPEN THE HOOD BUT THE SMOKE WAS SO THICK, DARK TAN AND PEPPERED WITH BLACK, THAT I COULDN'T GET CLOSE. THE STORE EMPLOYEES CALLED THE FIRE DEPARTMENT, THEY CAME AND PUT OUT THE FIRE. THE WIRING, PLASTIC CONTAINERS,HOSES, INSULATION, ETC. WERE BURNT TO A CRISP. WE STILL DON'T KNOW WHAT CAUSED THE FIRE, I COULD HAVE BEEN KILLED!