The Bulb(12v21/5w) is the cheapest item from this partsfiche.
Parts such as the Rear Combination Lamp: Bulb(12v21/5w), Washer, Screw 6x12, Lens,rear Combination Lamp are included in the Gs450l 1982 (z) (e02 E21 E24 E25 E34 E39) Rear Combination Lamp parts fiche.
This REAR COMBINATION LAMP assembly utilises four Screw (4x55)(s) - the highest specified component.