Originally Posted by barry12345

The outer cv joints may need lubricant added even if the boots appear dry. A syringe and small hose can let you add some with the inboard boot clamp off. A very heavy oil is best.

This is not an absolute solution but something that perhaps should be done anyways on these very old mercedes cars.

Plus the first symptom of an ultimately bad cv joint on these cars can be an intermitent click click sound. Catch it early enough and all will be well.

A problem on that side as actually the slight discoloration on the axle shaft looks like some lubricant may have been lost there over the years. The original joints where oil lubricated rather than grease.

Oil is better and if what I suggest cures the problem on that side do the other side as well as a preventative thing. Drive on it too long and you will seriously damage the joint. Fortunatly the design seems to give advanced notice of being pretty dry on these cars. Yours is talking to you now I really suspect. Also look to make sure the boot is still intact. A little oil creeping out the end of the boot over time is in itself not an indicator the boot is bad