A dreaded vacuum question.

Well, I have a Mity Vac and decided to get crazy tonight.

I figured everything out except one thing.

Here are the two lines that won't hold a vacuum.

The Yellow (which I know runs to the distribution block in the drivers door).

BUT, here is my main issue for you all, and it is embarassing for me to ask, but what is the Gray with Yellow tube?!?!?!?!?!?!?


I have spent two hours under the dash trying to look at it, and spent another hour reading through all the searches and looking at my manual.

I know the information is somewhere, it just is alluding me!

Thanks guys,
PiP

Ah, it used to be in my sig.

1977 300D

Perhaps the headlight adjustment vacume tube? Not sure if 123's had that in 77 though. Or if US spec lights were remotely adjustable.

- Peter.

__________________
2021 Chevrolet Spark
Formerly...
2000 GMC Sonoma
1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles.
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S

126 Views and no one can answer this question???

Someone here has to know.

It is on the tee with the Yellow door lock tube.

It is a gray tube, with a yellow stripe and it runs under the dash by the steering column.

Anyone?
PiP

edit:thanks for answering Peter, but I dont think the car has that.

PiP:

Gray with a yellow stripe? Thats new to me, although I've not dug around much in W123s.

The yellow line will go to the driver's door and to a vac reservior, usually under the left front fender. If it is leaking or there is a bad connection, you will have no door locks.

Try checking just the yellow line -- if it holds and the locks work with the MitiVac, you probably have a leaking vac tank, and I assume that is where the line goes. Check the rear bumper for a tank, too -- some models have one back there, and if the line is broken, no vac.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

It was the one to the vacuum tank!
I am so happy! Thank you for your answer.

The line was turned, I didnt see the yellow stripe.


PiP (need dunce hat for tonight)

Hey, it took two of us and about six weeks to discover that if you leave the top fitting of a filter cartridge in the water purification system the standard cartidge (without the removable adaper) won't fit.......!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!