I reckon stick with the Audi rims as the Merc ones are more common.
Well i've just orderd the wheel adapters,that will gonna take a week, custom made But maybe i can borrow some for tomorrow to fit them
Well the adapters will be made for the segins.20 and 25mm thick.I think that for the audi's i need 15 and 20mm.First gonna try it, the segins are nice if they stay in the arches the monoblocks need to be straight with the arches for max result