So I did a quick search and I have been having a hell of a time finding a diagram that matches my car... And that's the main issue I have. I just bought this car on Friday.

I believe someone removed the EGR so I'm not sure how my vacuum system should lock, and i'm also not sure what all the lines go to. The diagrams I find list colors but it appears that many of the lines have been switched with newer lines.

Anyway, my issue is that the car revs really high before it tries to shift, but when it shifts it feels like a normal shift. No grinding noises or stuttering or anything. The fluid is good and up to proper levels (I checked earlier today just to be sure) The previous owner told me that he kind of winged it when it came to the vacuum system, he didn't have a diagram and there's not one on the car I already checked.. The problem is the car he based it off of I believe is a 85 300TD... I'm not sure how much the routing changed but I think enough to cause issues.

Link to album: https://imgur.com/a/hgPeL4v

I'll try drawing a diagram showing how everything is routed tomorrow, looking at the photos I realize that is likely the easiest way to understand how things are routed at the current time.

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1981 Mercedes 240D - Automatic transmission