Best place to purchase owners manuals?

[86560SEL]

I am in desperate need of an owners manual for my 1985 Mercedes, but cannot find one ANYWHERE. I do not know how many of the controls/functions on this car works. I know I could check them all out, but I do not want to press the "wrong" button.

Can anyone steer me in the right direction for finding one? It is a 380SE, but it seems as if there are seperate ones for each model, rather than the "class". I thought one would cover the entire "S-Class" line. I found one, but it was for a 300SD. Did the 380SE and 500SEL share the same manual, or are they seperate as well?

Thanks!