They are LED's..... not repairable. You need a new light unit.
#100 here:
http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=170465&M=112%2E947&GA=722%...18&GM=7
"Zakaroo" wrote in message
> My slk has a blown bulb on the wing mirror indicator cluster. Is there a
> special knack to taking the lens cover off or do I use brute force and
> ignorance?
>
>