Tried cleaning another time just to make sure, no difference. And yes Doc, I'm aware of how a throttle, butterfly valve, and its actuator work, been working on domestic cars for 15 years, this is just my first Benz and I'm not familiar with Benz specs. Going to pull the throttle housing in the morning and take it apart to check the condition of the actuator. Will let you guys know how it turns out as I have nowhere else to go from here.

I left you some links on the other forum. check them out first....

good luck

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1993 300E, 2.8 M104 .....