'87 560 SEC, Pearl Grey/blue; 300,000+ mi; '07 CLS 550, Barolo/stone; 90,000+ mi
Check out Gerry's writeup on the 500E forum, C126 section. He has a step-by-step pictorial, basically a more complicated version of the front bearings (removing more parts to get to them).That.
I am experiencing is droning sound on the car since I've bought her. And from previous experience with my W123 I reckoned it was worth tightening the wheel bearings to see if I can compensate for the wear of 420 000km. The left wheel bearing was adjusted without a hitch, but the right wheel bearing is not worth bothering (not that I didn't adjust it anyways) because it has what can be best described as "a bump in the road" every revolution. This is symptomatic of a bearing that has experienced brinelling. It is also the sole source of the droning.
But one never replaces one wheel bearing; at the very least replace the bearings on both wheels of the same axle. I can replace the front bearings myself, but I may have to let MB do the rears for me.