How difficult is it to redo the rear suspension -
replace links, bushings, control arm struts , thrust arm etc.

The rubber is just about gone. I haven't done this before, can do brakes up to replacing calipers, and have done more advanced work on earlier gas model MBs (like 220SE, 250SE, 280 SE from the 60's).

But after reading many posts I'm somewhat intimidated by this 124 300d.

Does the spring have to be compressed? Does everything with rubber bushing need to be replaced.?

All suggestions greatly appreciated.