My 1980 240D arrived today and I found out the heating and cooling system in non functional. I can't get hot air or change any of the duct outlets. I opened the hood and found some vacume lines unpluged and not attached.

Is there anywhere online I can find a vacume diagram for this car? If not is there somewhere I can get shop manuals for it?

check the top of the diesel forum for a reference for vacuum diagrams.