I am trying to narrow down sources of vibrations in my 1986 300e. I know for certain that the differential mounts are toast. I will have to get the car into the indy to take care of those, but I noticed that the rear flex disk has a crack leading from one of the bolts to the exterior of the disk. I assume that means it is time for a new one, and I like to do packages of things, so I would like to do the front and the bearing at the same time.

Questions:

• Are there any special tricks to replacing the flex disks?
  
• Should the center bearing be replaced at the same time?
  
• Does the bearing just slide off the end of the shaft?
  
• Can a guy do this by himself without a lift?
  
• Can two guys do this without a lift?
  
• Will the shop doing the rear diff mounts be in a good position to replace any of these parts?

Thanks for all your help! And thanks for helping me make a good W124.

I'm sorry to ask a question that I am certain has come up before, but I wasn't finding a straight set of answers using the search.