I just replaced the rear brake pads in my '81 300D because they were starting to squeal when I came to a stop. I installed Mercedes OEM pads (along with anti-squeal compound), and the squeal is still there. The rotors look to be in pretty good shape. They aren't noticeably grooved but do seem to be glazed.

I don't know what else to do except cut or replace the rotors. I have two questions:

How do I get the rotors off? I have removed the calipers but cannot find anything else holding the rotor on. There is a bolt in the middle of the rotor which I removed, but the rotor is still stuck tight to the hub.

Is it OK to turn the rotor if it is still within thickness tolerance, or do I ALWAYS have to replace it with new?

Many thanks to anyone who can help!