While rooting around under my dash this weekend, I found a 'free hanging' vacuum line under my dash and I don't see where it was attached. It originates from a "Y" connector in the engine compartment and goes through the firewall. It sticks out about a foot from the firewall on the inside and was hanging beside the steering column. Any ideas where this should be attached? My cruise control has been acting up recently and finally quit last week....don't know if it's related.

Thanks for your input!!
Keith

__________________
1983 300SD "Helga"

Is it a black line? There is supposed to be an open black vent line under the dash. BTW, the cruise control is unrelated to the vacuum system on your car. Do a search on cruise control amplifiers.

Yes....it is a black line. So, I haven't disconnected anything under there? I didn't mention this before, but I can blow and suck air through the line. Should there be some resistance in air flow in one direction or the other?

Thanks again....

__________________
1983 300SD "Helga"

does the car start and shut off with no problem.. if it was me id just leave it alone

I believe it is the line labeled "a" on this diagram:

http://home.comcast.net/~phantoms/vacuum/engine2.jpg

If you look under the hood, you should be able to verify the other end is connected properly. I've never tried to blow through it, but it sounds like it's OK.