Concerning the trailing arm bushings on a w123 I don't remember if is a wiki or just in the repair links bet there is a better thread by a member with dan in his member name.
I changed the Sub Frame Bushing by lowing one side at a time. I remember having difficulty getting one of the bushings out. It took a lot of prying.
Getting at the passenger side inner training arm bolt I had to remove the Driveshaft from the differential and in the process I ruined the Drive Shaft Support Rubber. So be sure to remove the bolts from that and be carful when you remove the shaft from the differential.
So I ended up pulling the whole drive shaft and also replaced the centering bushings on the drive shaft.
There is 2 attached pictures one showing the issue with the passenger side inner trailing arm bolt and the other showing how I supported things for the trailing arm bushing change. (I have a lot of jacks!)
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