w126 wont shut off when i turn the key into the off postion. i checked all the vacume lines i could find. the linkage moves freely. whats wrong?

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83' 300SD Turbo, intercooled,
71' Porsche 911 T Targa.
85.5' Porsche 944 euro
87' Fiero cp.
Lamborghini Diablo replica V8 4spd.

You might need a might vac and some golf tee's. Temporarily you can shut it off manually by holding the stop button located on the linkages.

Usually the lines get a leak from wear (i mean these cars are over 20yrs old) Youll need a mighty vac to determin which line has a leak. The golf tee's can be used to plug up the line thats leaking preventing the car to start.

If not then it might be your shut off valve, and how to replace that? here yah go!

http://dieselgiant.com/repairyourshutoffvalve.htm

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Current:
05 E320 CDI
07 GL320 CDI
08 Sprinter
05 Dodge Cummins
01 Dodge Cummins

Previous
2004 E55 AMG
2002 C32 AMG (#2)
1995 E300
1978 300D
1987 300D
2002 C32 AMG(blown motor :[
1981 300SD
1983 300SD
1987 300SDL
2002 Jetta TDI
1996 S420
1995 S500
1993 190E 2.6
1992 190E 2.3
1985 190E 2.3 5-Speed

The vacuum activated fuel shutoff is on the back of the IP. Might just be the flex fitting there. A good place to start is to just replace all of your flex lines (about $10)

Did this happen all of a sudden or gradually get worse over time?

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Sam

84 300SD 350K+ miles ( Blue Belle )

its been like this since and before i purchased the car. Im just wanting to take care of the issue before winter.

__________________
83' 300SD Turbo, intercooled,
71' Porsche 911 T Targa.
85.5' Porsche 944 euro
87' Fiero cp.
Lamborghini Diablo replica V8 4spd.

Are there any symptoms from the other vacuum operated devices? Do your brakes seem good? Climate control? If your vacuum pump is weak, and needs a rebuild kit, this might be the cause. But back to the original suggestion, the only way to be sure is a mightyvac or other vacuum guage.

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )