The car is a 1993 190e 2.6L There are two vacuum lines I would like to identify where they go. Both starts at the engine compartment and go towards the transmission. One of them is white and is right next to injector#6. It comes out of the intake manifold. The other vacuum line is black and has a green stripe on it. It is attached to a piece (I don't know what is for). That piece looks like the one attached to the EGR valve with a vacuum hose. It is to the left of the brake booster bolted to the fire wall.

Which one of these two vacuum lines go to the tranny modulator?

PS.The white one holds vacuum when I use the vacuum pump and the other (blk/grn) does not?

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Meza
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer

Different cars, but on the 560 the white line goes to the modulator. You could look at the modulator and see what color line is attached.

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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.

On my W124 car, there is a switch over valve mounted on the firewall behind the brake master cylinder.

It has a black line (electrical) and a green line (vacum) connected to it.

The green line goes to the upshift delay valve on the side of the transmission.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

About the switch over valve, how does it operate/How can I test it? Should the black/green hose hold vacuum (when I apply vaccum to it) using a pump? I guess the other white vacuum line is the one going to the modulator.
Meza

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Meza
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer