on this diagram what is number 20 and 21 the one line comeing from the vacum pump that goes to 20 (orrifice) if you introduce vacuum it leaks what does that do with the 21 coming out of it. it seems like they are all part of 22. what is the purpose of all that arethey all conected and where does 21 go????
any help will be appreciated i went to mercedes dealer and spend two hours trying to find and order that part and they could not find it
thank you
Denis