A sample from the products for the Rear Combination Lamp (e21) include: Bulb(12v21/5w), Spacer (6.8x10x11.5), Bulb, Lens,rr Combi.
The Bulb(12v21/5w) is the cheapest item from this partsfiche.
Of all the components used in this assembly the Lamp Assy, Rear Combination is the most expensive.