Hi! Have a 2008 e60 525d .

followed the diagram an diy to the very least. But i seem to only get it to go up when i connect like this. But if i reverse the pins - 3(blue) to 20 instead of 19.
and 1(black) to 19 instead of 20 It goes down again with the touch of the button. Anyone know whats going on? 🤔🤔