I own a 1985 230E W124. The car runs good until it reaches operating temperature, then it starts running very rough IE running on 1 or 2 cylinders, little to no power. I can shut it off and restart with no problem. It will run fine for a while then the problem starts over again. Has anyone had this problem? Where to start looking, CPU, Ox. Sensor, mass. Air??????

Well, if it runs fine until it reaches operating temperature, I'd check out the temperature sensors.

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.