The sub assemblies and components that make up this Fuel Tank include this Tank-comp-fuel, the most expensive part.
Parts such as the Fuel Tank: Damper, Cap-assy-tank,fuel, Damper, Grommet are included in the Kaf620-a4 Mule2510 1998 Europe Fuel Tank parts fiche.
The component with the lowest price in the FUEL TANK schematic is the Nut-hex-small.