Sub frame
Sway bar
Trailing arm
Transmission mount
Engine mount (pair?)

Assuming you didn't get any service records with this car illustrating recent replacement, all these are due to be replaced. They are not particularly difficult to do yourself, and I believe all installs are in the archives here. 111 is more or less a 108 coupe, so many systems are identical between the two models.

Bilsteins are the standard for shocks.

If the compensator is blown, MB produced a spring-based replacement which should work just as well. Not familiar with anybody rehab-ing these units, although rebuilt compensators pop up on ebay from time to time at about $200.

I'd tackle this compensator issue first if this were my vehicle - and it's fun to pretend that it is.