Replace the shocks they make more of a difference in the vibrations you feel then the motor mounts. It is a pretty straight forward job OhioSDL nailed it. However on the passenger side mount I stripped the head out of the bolt
But luckly the engineers at MB thought of this! The big alumminum motor mount is held in be four bolts, you can take the whole thing out. It is a huge pita but can be done.