headrests
1. the headrest moves up and down automatically as you slide your seat back and forth. The further back you go, the headrest will be raised up relative to what position you're in. I suppose it's German safety engineering that if your sitting way back, the car assume you are "this tall" torso-wise. So at a minimum the headrest should be "this tall" so you don't snap your head in case the headrest is way on the bottom. Similar feature was on my former 5 series's seat belt shoulder height vs manual seat belt height adjustment.
2. So at every horizontal position of the seat, there is a "minimum" headrest height. you can always go further up, but can only go down to a certain minimum. Thus in order to move it all the way down, you need to move your seat all the way forward. or at least forward enough so it can be lowered to the lowest position.
hopefully I explained well.




play with it, you'll know what I am talking about.




play with it, you'll know what I am talking about.






