84 300d hard/won't start warm

I just got the car. its a 1984 300d The engine sounds and drives very good; smooth and quiet, scored really great on emissions, %3 opacity. The problem: when warm, if I shut it off for more than a few seconds it won't start, like it's not getting air; egr maybe? If I wait for about 15 minutes, It will then fire just fine with a bump of the key. I figured out, through necessity, that I could repeatadly bump the key to get a start after 5 or 10 bumps, but had very little power with that method, (lack of turbo?). this sound familiar to anyone? thanks first post