My 95 E320 has 137K on it - the engine runs fine at startup and for 3-4 minutes of cold driving. Once it warms up, it runs very rough, missing and almost stalling at stop lights, with poor to no acceleration. As long as I feather the gas, it goes, but anything more than a light touch on the gas and it hesitates and occasionally backfires. It seems okay at higher or highway speeds, although I haven't tried any passing manuevers or the like. I replaced the wiring harness recently, have no check engine light, and no problems with ABS, which (I think) eliminates the OVP. So now I'm wondering if it could be throttle actuator, coils, mass airflow sensor?

Any thoughts or observations to help a newbie? Thanks!