90 percent chance the suspension will need the "bombs" (fluid and air filled reservoirs that are the heart of the suspension) these can be pricey if you don't put them in yourself there are two of them. expect to pay 100-150 each for new ones. also while you are doing this replace the fluid and filter for good measure.

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1987 300D 180k
1985 300SD 330k Helga
1992 300D Lola 269k- Sold
1986 325 coupe Bessie >300k Original engine(ODO Broke) sold
2006 2500HD Druamax Linda- Tows boat and looks pretty in garage thats about it