I have done rear and front bearing replacement on 85' 7 series BMW but only front on MB. If these are anything alike, I can tell you the procedure. The BMW manual "recomended several special tools, but I found that I could do it with what I had; brass-hammer, gear puller, caliper, runout gauge, micrometer, some neat sized sockets that just happened to be the same size as the bearings channels, and resourcefulness.

If you know that these are anything alike, e-mail me or reply here and I'll give you the procedure.

ATLD