Sounds simple enough, I haven't had a chance to mess with it but i will in a day or two. right now i'm working on the vacuum system. I'm a little more familiar with that. One of the reasons the PO sold the car was no shutoff.
I've already got the engine shutting down. the locks are the culprit, just haven't isolated the offending unit.
Thanks for everything
Jon J

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Jon J.
81 240D

I am starting to use mine as it is getting colder. Problem is when my wife uses the car and forgets to turn it down. If she drives with the front door locked, the vacuum leaks out and the car will not shut off.

I need to get one of these knobs, since mine broke. They used to be made of steel, anyone got a metal one?

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

I use the idle adjustment when it is really cold out.
Also found it helpful when trying to move car on ice; a little throttle caused wheel spin, slightly increased idle was like having a creeper gear and drove the car right out.

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95 E300D working out the kinks
77 300D, 227k, station car
83 300CD 370k, gone away
89 190E 2.6- 335k, no more
79 VW FI Bus- 145k miles, summer driver
59 VW Beetle ragtop- 175k miles
12 VW Jetta- 160k miles

It's only meant to use briefly when the engine is dead cold, not much need for it in warm climates, don't remove it as one day you may well need it .

The little plastic thing on the end crumbles once in a while, it has a 116 part # and Mercedes still sells it .

I've never seen the adjuster knob to be metal on a W123 .

Once you've adjusted the IP and so on, the cable end is easily adjustable to give a little boost in RPM's using two open ended 13MM ATF wrenches .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better