It always used to be the case that if you spec a Merc de-badged, the dealership remove the badges before the hand-over. I've done this in previous years when my car has been particularly powerful (I love the wolf in sheep's clothing approach).
Had a C-Class last time round which the dealer de-badged for us. (although i've previously always done it myself on a variety of cars)
think im going to keep it badged this time round though (might save the 'what car is that mate' questions!!)