Just replaced my bushing. It is a very tight/pressed in fit and it was easiest to remove the shifter from the car, use a vice and sockets to press the bushing in, and reinstall the shifter. I assume you are working on a W123, here is the part:
1159920310
[IMG]http://www.***************/secure/PartImages/1159920310.jpg[/IMG]

Febi
Auto Trans Shift Linkage Bushing; At Shift Rod, White Plastic
For models with automatic transmissions. Also need 0009944160 retaining clip.


The linkage rod I think will need to come from the junkyard.