If they are like the front ones, there is one small screw that must be
removed and after that they should just fall off. BUT, they tend to get rust
between the rotor and the hub that keeps them attached. What you need to do.
is apply some heat with a propane torch and then hammer them hard with a
large hammer. You could also try getting some penetrating oil (WD40?) to
flow between the rotor and the hub.
It's not often possible to skim the rotors very much - You may have to buy
new ones , especially if you damage old ones getting them off! I think that
MB shops have a machine that can skim the rotors in place.
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