I have a manual also but it is just a photocopy and the pics are dark and hard to see sometimes.
Do you do the work yourself on the suspension? I'm tempted to try but it seems a little complicated. My Euro 500SEL rides like a bicycle with too much air in the tiresd. It is harsh and you feel every bump in the road.
84 500SEL EURO 101K ( JUST LIKE MY 1ST WIFE. GLAD TO GET RID OF HER! )
85 300D 310K (sold)
90 350SDL 184K sold
83 300D 118K (sold)
88 300E 153k (sold)
93 400E 105K (sold)