Same problem with 88' 300E suspension
I also just completed a brake job on my car and found the same situation with one of the rods in the rear suspension. The bushing on the "push rod" (third rod from the bottom front of the rear wheel) is all but gone at the end away from the wheel. It looks like it might be a simple process to replace. Can someone confirm that this is a DIY project. Each end of the rod has a bolt holding it in place. It looks like you could remove the old part and replace with a new one. Could this part be responsible for the loose feeling in the rear end?