Vacuum leak found!
 

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?

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

website
 

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

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

Go to Ebay
 

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