Thanks. I will be installing new Lemforder flex discs this weekend (assuming UPS brings them as expected tomorrow). I had been wondering if maybe they could somehow be invovled, but I'll have the back wheels up. I'll pull them, and check everything out with the bearings. That would be great if it was just a wheel bearing!

Otherwise, I found a few Diffs on ebay, Crossfires and SLK's. I assume first gen SLK320 diffs are the same. They appear to be the same size, and have bolt on axles. Just not sure on gear ratios.

So, when you did change the bearing, was the old bearing obviously/visually bad?