I'm looking to install a vacuum/boost gauge in my 1986 190e 2.3 and I'm not sure exactly where the vacuum lines run. If any one could tell me where the best place would be to hook it up or even just point me in the right direction that would be much appreciated!

 

Well, you already have a vaccum gauge in the dash, it's the Economy pointer. Where would you be getting "boost" from?

 

If you dont know where they go then I suggest you not get one.