I've replaced the breather tube and checked all vacuum lines (I can see) and confirmed the EGR valve was not stuck last night. I think the car has adjusted for most of the idle problem however it now surges repeatedly at speeds of 3-5MPH. My friend helped me with removing/replacing the intake manifold as I was removing/replacing the EGR valve and changing oil so I don’t know if the throttle actuator had a vacuum tube going to it(?), does someone have a picture of it on the M104 engine? That would be the only vacuum line I cant see. If the vacuum line was disconnected from the throttle actuator would it stop my cruise control from working?

Thanks guys,
Brad

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1986 190E 186K (For Sale)
(Maroon, Tan leather)
1996 C280 Sport 208K
(Brilliant Silver, Black Leather)
2002 CLK430 Sport 45K
(Brilliant Silver, Gray Leather , Birdseye Maple)