No problem... aside from the calipers, the rotors are only like $160 - $165 from memory right from the Mercedes dealer. (think I paid $20 to have them both redrilled for the bolt pattern..let the place who built my wheels do it, since they are all drill bolt patterns in things)

So it makes for a very economical setup, if you are able to make the caliper brackets like I did.



Oh, and the hubs too...I used some new ones from Oz.. but you could use drum ones, cut down old rotors, etc..