I just performed this maintenance on my 300SD. Replaced the rear subframe bushings as well as the front carrier bracket bushings. The rear subframe bushings came out easily with the threaded rod removal tool pictured on this forum. The carrier brackets I had to remove and take to my indy to use his press to remove old and press in new bushings. His mechanic gave me a tip that worked extremely well when pressing in the bushings. Lube the bushings with petroleum jelly. WOW, what a difference in getting them to press in. Once I got them started in the housing they just kept on going.
I'll use this advice on all future pressed in bushing replacements.
John