I know this is an ancient thread, but I successfully replaced my '86 560SL front subframe bushings today using a hybrid of YuCrew's and RandyA's methods mentioned here.

I did disconnect the engine shock, torsion/sway bar link and shock absorber but did not disconnect my brake lines. I was able to drop the subframe about 3 inches without tensioning the brake lines (it helps to turn the steering fully in the direction of the side your working on). The old mounts came out with just a little screwdriver prying...I didn't need to push them out (or back in) with the jack. The new mounts took a little bit of jostling to get seated (lubricating them and the cups they rest in makes a huge difference).

I knew they probably needed replacing when I jacked the front end up and saw this substantial gap:



That, and an annoying rattle from the front end on bumpy surfaces.

Here are the driver's side mounts compared to a new one...



The worst of the old mounts was broken pretty badly, although the rubber didn't look too bad (MB OEM part).



New mounts were made by Febi in a kit including all four front mounts & hardware.

Thank you for sharing your experiences YuCrew & RandyA!
You have helped me alot today!