WD-40 I forgot to look for a Mercedes part # but just checked online and found a light assembly here for $10. I cut another hole in the trim panel, use the dimensions from the installed light , I think I used a box cutter with a new blade and tried to mirror the location on the other side of the car. I ran the wiring from the existing light behind the panel over to the new one.
try to find a high output canbus led bulb they're brighter than the stock one . Hope this helps

https://www.autohausaz.com/pn/1248200301