FIRE UNITS WERE JUST RETURNING FROM AN ELEVATOR ENTRAPMENT WHEN THEY WERE DISPATCHED TO A REPORTED CAR FIRE ON THE CORNER OF FRONT STREET AND SOUTH PLAINFIELD AVENUE.  LT BULLA ARRIVED AND TRANSMITTED THE WORKING FIRE SIGNAL AND ORDERED ENGINE 6 TO STRETCH IN ON ARRIVAL.  THE FIRE WAS CONCENTRATED IN THE ENGINE COMPARTMENT AND A QUICK KNOCK DOWN WAS ACCOMPLISHED.