I just changed these on my SEC.

The smaller bushings are jump bump stops from all I can tell. They are located directly above the center of the large bushings, on the same bolt.
When you start to take the large ones out, you'll find the little ones up above them, surrounding the threaded piece in the body where that large bolt threads into.


Personally, I didn't find this all that difficult a task, other than getting over the dread built up reading all the accounts people had about it, here on the forum!
A quick rattle from the impact wrench loosened the three bolts on each side, (two locating bolts, the one main bolt) and a bit of creativity with a piece of all-thread, some washers, and nuts got the old pieces out. I got impatient after a bit and used a small floor jack to put a little extra pressure upward on the subframe, pushing the bushings out faster than the car's weight was doing.

Installing them, I used the same threaded rod, washers, and nuts, with the addition of an old circular saw blade as a large washer. Then I replaced the saw blade with an old 2.5lb barbell weight. The application of a good bit of silicone spray lube on the bushing let it slip right in.

To get clearance for the ratchet on the top of the subframe while pulling the new bushing in, I used a large pry bar to push the subframe down from the body of the car 2 inches or so, before letting it back up, holding the ratchet in place against the body mount, which made the installation that much easier and quicker.

__________________
-Josh
Testing the cheap Mercedes axiom, one bolt at a time...