W220 Summer opening function ?

Hello everyone, there would be a small problem with my “summer opening” of windows and sunroof. This always worked correctly: standing in front of driver’s door (side), thumbs open and hold. Windows, sunroof up completely up, driver’s seat cooling level 3. Yesterday stop not ! Windows and sunroof about 10cm up and stop. Seat cooling level 3 ok. I then drove all windows and sunroof each in all ending positions and tried repeatedly. [against the W220 dementia ] Nix, always only 10cm down/up. The BA also gives no explanation (or I didn’t understand ) Would someone have an explanation and thankfully a help to it ? With thanks in advance and on a bit (bish?) [a little?] CoolingGruetzi Miteinand