One rotor on the rear of my 190d was no longer flat so I am replacing both rears; they came off so easily I was amazed. With the new ones on, there is a certain amount of drag on the parking brake shoes. This is before the calipers are installed btw. I guess Im wondering if these should be as tight as conventional drums would be or if I should draw in the shoes a little bit? I'd hate to bake my new rotors the first time out!