Thanks for all of your replies.

I went to my Mercedes dealer today to inquire about lowering the idle speed from its current 750-800 RPM back to the normal 600-650 RPM. The head mechanic told me that there is no adjustment for that, that my problem is probably sensor related. He may be right about the high idle speed being possibly caused by a sensor or the wiring to it, but I believe that he is wrong in stating that there is no idle speed adjustment on this cars.

The information that I picked-up from "ALL DATA" for my car, and from other members on this, and other Forums specifically explains that there is an adjustment for idle speed. Basically its done by turning a bolt clockwise on the Fuel pump.

I trust the members of this group, more than I trust my Mercedes Dealership's mechanics.

Thanks again,

Phil

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'95 E300 Diesel, 264,000 Miles. [Sold it]