Bulb size/type 300E/500E rear pkg. light & License?
 

Need to replace bulbs. The rear pkg. light is in the center not side marker.

Make sure you use Osram lamps or the equivalent. Otherwise, the system that detects a lamp out won't work correctly. The best place to get them is at a dealer.

Doesn't your owner's manual list the lamp types? Anyway, a dealer parts guy can tell you what you need.