The Ew50 2003 5wk1 Spain 1b5wk-300e1 Crankcase consists of thirty-one pieces with the Crankcase Assy being the most expensive.
Some items from this specific schematic: Bolt,hexagon Socket, Breather, Gasket, Crankcase Co (nas), Pin, Dowel.
On this parts fiche the Bolt,hexagon Socket is the most specified component.