I haven't been on the forum this weekend much, but after reading your thread, I would bet on the CV joint rather than the bearing. Bearings usually roar, while CV joints can do many different things depending on failure modes. Bearings usually make a constant and relentless noise until failure, little can be done to eliminate the noise.

The real tip-off is moving the joint temporarily eliminates the noise. By moving the joint latterly you may be squeezing a little lubricant into the wear areas or causing it to run in a less worn position. This never lasts long and the problem returns.

The axle shafts are throw aways, it takes special tools to rebuild them. You can get replacements (most are rebuilt) from Advance Auto. Most other parts sources have them also. Used is a possibility, but is risky. I just changed one of mine - paid $150 from Advance Auto (82 240D). Mine lost a boot and began making a clicking noise. I repacked it with grease and put on a split boot. The noise stopped and it ran for another 50,000 miles, before the boot failed again.

Since the failure mode is usually loss of lubricant, you could take a stab at injecting some grease into the joints, if the boots are still good. You'd have to remove the boot clamps and slide the rubber back, so that it could be packed with grease. This is risky, because a 20 year old rubber boot is apt to be fragile. The lubricant they use is a heavy oil, but I have found grease works just fine. You may have to find some replacement clamps, if you can't save the old ones. It might work, if you are looking to save money.

Good luck.

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1976 240D
1987 560SL
2007 E320 Bluetec
1998 C280 (now son’s car)
1982 240D Manual - Sold