My experience as been that the outer bearings will slide out once you remove the locking collar. Then, replace the locking collar, but just put it on a thread or two, and pull on the wheel, and the inner bearings and seal should pop out. If that method fails, simply remove the hub and drive out the old inner bearing and race from the outside. I have never had a problem removing bearings from MB cars. I have a 123 car and a 126.

Good luck.

Joe B.