Bowden cable was adjust ed already, and shift points are fine.

Can anybody provide me a vacuum diagram which would help me to track all the lines?
Must be for 1996 E320 i6, not v6 if that matters.
I googled for hours without luck.

Update: When it shift with rpm >= 4500-5000, shift is smooth as it once was, cant barely feel it. But with low rpm, shift is very hard.
When accelerating to lets say 4000rpm, then breaking, the transmission shift, and its horrible hard.

And again, it does it only in one direction, from 1-2, 2-3, 3-4, but never from 4-3, 3-2.