Hunter in Post #6 of the below Thread:
DIY W126 Guide Rod, lower control arm bushing and Eccentric Pin Replacement
"Install the new inner control arm bushing caps, (a heavy thread or light fishing line works well to hold them in place for body installation).
A press is nice, but not critical.
Note: Some of the aftermarket repair kits will fail to remain pressed together.The caps can be held in position with a heavy thread or light fishing line, while jacking the arm into the body bracket.
The body bracket applies enough compression for initial seat, and the eccentric bolt completes the compression seating.
With a spring compressor, this is a relatively easy DIY. Note: Unless there is extreme corrosion seizing the eccentric in place."