thanks for all your replies on the "can i trust jiffy lube"
let me apologize for my lack of terminology, i have been searching but have not found what i am looking for, maybey due to my weak Mercedes vocabulary!
on the vacumm mechanism that has aline that leads the the transmission, there are two little metal protusions that point to the passenger side. when i pull on the throttle linkage, it appears part of the mechanism is supposed to touch the upper small metal protusion, and when the throttle is closed it appears as if the part of the mechanism is supposed to touch the lower metal protrusion. mine do not tough these metal protrusions at anytime. Any ideas what i am talking about?
thanks for the help. 1980 300td with later model engine (possibly transmision) with a turbo
will

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'73 VW camper
'80 300td wagon