Not to hijack your thread, but is it obvious where the electrical portion of the switch over valve runs? I am trying to figure how to add one to my 240D frankencar. Also I think that the dieselgiant pictorial does show which port connects to the banjo bolt. I believe that it is the one that is being pointed to with a screwdriver.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine