DURING THE PROCESS OF FILLING THE ALMOST EMPTY TANK WITH DIESEL FUEL, AN ELECTRICAL SHORT (PER REPORT OF THE LOCAL FIRE DEPARTMENT THAT WAS CALLED IN) CREATED HEAT THAT WAS ABLE TO MELT PART OF THE TANK IN THE AREA OF THE FILLING NOZZLE, COMPLETELY MELTED THE RUBBER STRAP HOLDING THE FUEL CAP AND MELTED/BURNED THE SPLASH RING ON THE FUEL DISPENSER. THE METALLIC RING OF THE FILLING NOZZLE TURNED SO HOT, THAT FUMES/SMOKE BECAME VISIBLE. DUE TO THE POSITION OF THE BATTERY BENEATH THE DRIVERS SEAT, THE FD WAS NOT ABLE TO DISCONNECT THE BATTERY.