Pezzy,
Suggest you jack up the wheel in question. Once the tire is free of the ground, spin the wheel and listen closely for any grinding sound. You can also grasp the top and bottom of the tire and test for play in the wheel. There should be no play. If there is, then you will have to determine if it is in the suspension or the wheel hub. If in the wheel hub, you have a bearing problem.

If there is a bearing problem, do not delay getting it attended to. It could lead to some serious consequences.

Hope this helps. Good luck with it.

__________________
Ted
1979 240D
165,000 miles