Thanks so much for replying.
I was about to order new wires and plugs today.
Should I order a new distributer cap and rotor and do everthing at once?
I am not sure what my idle speed is. As you can tell, I am new to the world of working on Mercedes. I have a 1985 380SE and a 1980 300SD. I am absolutely in love with Mercedes but will be seeking much guidance in the world of mechanics.