I have metal wire mechanism for the gas pedal, but i also have the throttle body with a huge (potentially corroded) wiring harness.

As for the tune up, the engine has had a head gasket done recently as you might remember, all new spark plugs, wires, some sensors, hoses,,,,etc, not much more to change!

I am doubting something in the transmission, because it shows signs of oil..not sure what the name is, but it the vacuum line connection at the tranny side....

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1993 300E, 2.8 M104 .....