Does it bounce when you drive it? The accumulators are the cheapest and easiest parts to replace. To check them you can remove and put a pencil (eraser side into hole) and see if the membrane is still there. If there is a difference between the left and right, you should probably change them both. The shocks are very expensive. Any signs of leaks? You should change the fluid about once a year or so.

Hope this is of some help.

__________________
Mike Holbrook
1983 MB 300TD-T (aka -- Daisy)
Spring Valley, CA