am finalizing my conv. of a 1987 190E w/ a 1984 190D 2.2 dsl eng. Update on the parts I was seeking. I found a Gates water pump and replacement belt tensioner assy. w/bearing from "********" all shipped for around $55. Parts look excellent and bolt right up. Hopefully I can get this engine fired up this week. I have the exaust hooked up, need to connect coolant lines etc. and will be ready to start engine. Can anyone direct me to a current source for a vacuum system diagram for a 1984 190D and 87 190E, W201 vacuum system? I'm in desperate need of one, also I may be missing a vacuum modulator(?) for this to work. The item I'm refering to in the pic below is located just to the right of the coolant resivoir cap, this is what I don't have anywhere on my car. The 2nd pic is of a 190D that does not have this item as shown in the 1st pic. It may be mounted somewhere else on other models but I don't believe there is anything like this on my 87 190E? My engine setup looks identical to the 1st pic, what do I need??? Thanks