1982 380sl not starting

[spkunkle]

Hello,
I have a 1982 380sl that I am having trouble starting, if I hold down the throttle plate just a little it starts and runs fine. I removed and cleaned the idle control valve, checked that it is getting power, it hums and clicks when the key is turned, so I am guessing it is working. does adjusting the tower screw open that throttle plate?

the previous owner said the idle was to high so he had a mechanic adjust it, when I got it it was already warmed up and running and worked fine for the 20 minute drive back.

any help would be appreciated,
thanks, Sean