I gave a 1985 280SL that is new to me. It unfortunatley is a little hard to start and it also accelerates really slowly. It almost feels like it just isn't getting the juice when I fully depress the accelerator. In addition, I noticed there is no whoosh sound when I open the gas cap.

I have done lots of reading and am trying to determine what a novice that is willing and capable but not a mechanic could try for remedies. Any trouble shooting steps or easy to do parts swaps are welcomed!

With this being a 1985 280SL (Euro model) I also am having a hard time finding parts diagrams although I know the parts are available. Any suggestions on where to look for that too is welcomed!

thank you