Make sure the reservoir is full of fluid. Make sure the pump is putting out pressure. Then first I would replace the accumulators. This is really the heart of the system. Next adjust the control unit that is attached to the rear swaybar. If the control valve is not working properly you can rebuild it. Finally the struts. The struts usually do not fail. but make sure they are not leaking. Besides they are expensive.
Also replace your fluid and replace the filter in the reservoir.

Do all fluids/filters and adjustments first. Then consider replacing the parts.

Dave

PS This sytem would also be under Diesel. Search the whole forum for this.

__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car