I finally found the vacuum leak, the master vacuum switch in the drivers door went bad. I used a 'Mityvac' vacuum pump with gauge. Testing the system was methodical and pretty easy. I purchased a booklet on testing the system from, dare I say, Mercedes Source. Simple and straight forward. ordered the new switch from Phil!

One question though. There is a green valve above the fuel shutoff valve, is it a check valve? If so, can I use a black and white one?

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

What was the name of the book. Does the seller have a website.

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82 300d 194
75 240d sold
Gulfstar 41 4-107 Perkins Westerbeke 4.4 Gen
Puegot Bicycle Legs
AYP Lawn Tractor Briggs 12.5

go to **************.com, book is called 'troubleshooting vacuum systems'

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

I would love to get that trouble shooting guide.Could not get a site to open with the e address you listed.Michael

Michael,

Try this

http://www.**************.com/

I have the guide and it is pretty helpful.

The "owner" of the site is a good guy. He auctions a bunch of stuff on ebay, but also sells direct. Make sure you check his direct price before you bid.

Good luck,

Jim

I think the green things are dampners, not check valves, so don't replace them with a black and white check valve.

The check valves can be replaced with any automotive vacuum check valve from the autoparts store.

Peter

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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!