Could be you have the wheel bearings too tight. there are spects of the tightness of them using a Dial Indicator. this thread has some good info, or do a search on wheel bearing Pre-Load.

http://www.peachparts.com/shopforum/diesel-discussion/245617-wheel-bearing-preload-tool.html

When I removed the Rotors I used an air impact gun, an electric one will work also.

Charlie

Using the dial indicator would be best of course, but I have heard an indy say "tighten the nut down just and bit more than you would on the same vintage American car" not much good unless your an old mechanic:rolleyes:

Why a bit more? Tapered roller bearings are tapered roller bearings. They don't know the nationality of the car in which they are installed.

You mean I've been doing it wrong all these years by following a false prophet:D I tighten the nut, whats a bit more than I remember when working in a gas station as a kid, haven't had a problem yet.

Here is an updated version of the DIY for replacing front rotors on the W123 platform


Mercedes-Benz W123 Front Brake Rotor Replacement | W123 (1977-1985) | Pelican Parts DIY Maintenance Article

where to get timken bearings?
 

Does anybody have a part number for the Timken bearings? I need both inner and outer, and the respective races. My w123 needs them, one of the inner bearings is collapsed on one side.

I need either a part number for Timkens or to know where you guys got them, I can't find a trustworthy site that stocks them anywhere.

Also is Meyle consider sub-par for bearings?