The badges are kind of tacky, especially on models with more lengthy designations: SLK 32 AMG V6 Kompressor, C250TD Turbo Diesel &c.
Interestingly, cars featured in German sales brochures appear without badges; when translated into English for the UK market, the same pictures are used, with the badge badly cut-and-pasted in.
If I had an E55 or a C32 (AMG V6 Kompressor &c), not only would I take the nasty little badges off, I'd have the bodykit replaced with stock panels. That way nobody would know what the car was. De-badging has always been part of the Q-car or sleeper car tradition.
There was a long thread on this in the past. See these threads:
http://www.peachparts.com/shopforum/showthread.php?threadid=32187&highlight=debadg%2A
http://www.peachparts.com/shopforum/showthread.php?threadid=15453&highlight=debadg%2A