If the old bushings are worn enough that you can feel play, they should pop right out. I applied SilGlyd(sp?), which is a silicone lubricant available at NAPA, to the new busings. Don't use WD40 or grease or anything that is not compatible with rubber. I don't recall having to struggle or use special tools to get the new bushings in.
On a 300SE, the exhaust has to come off to replace the big bolt. I hope you don't have to go through that trouble on your 560. A cheat of questionable value is to the install the bolt from the bottom. With the super high torque specification, I doubt it would back out. But consider the risk.