Klaus
There are many threads on this site regarding sway bar bushing replacement. This is one of my favorite, low expense and easy jobs to immediately improve the handling of 124 and 201 cars.
Here is a listing:
Changing sway bar bushings
The fronts are easy, can even be done while the car is on the ground. Turn the wheels full left and full right for easier access. Requires 13mm socket or wrenches.
The centers (attached to body brackets) and the outers (attached to the lower A-arms) are removed by sliding off and new ones sliding on. Best to carefully clean the sway off the ends before sliding the new bushings on. Using a little silicone spray helps them slide on.
The rear bushings (only two) are most easily accessible after taking off the rear wheels.
Haasman