I did those on a W124 a few years ago and they were replaced on the drive with a hammer, levering chisel, and block of wood. Soap up the rubber really well so that it is slimey to the touch and they slip right in.
Compressing the road springs was a nightmare. In the end I had to borrow the factory tool from the Mercedes dealership (amazingly, not one that I had frequented before either - I must have an honest face, I guess. Rofl).