Thanks you for the answer, but I did not mean the normal configuration menu. I mean the production menu described in the service manual. Before one of the last updates it worked like described in the manual.
Wenn you enter this menu, a normal android version is booting and you can install things like spotify connect etc. very easy.
– Enter BeoSound Moment interface (Jukebox) into production mode by:
1 Move the BeoSound Moment interface (Jukebox) away from charging on the BeoSound Moment hub (SoundHeart).
2 Tap 4 times on centre of the aluminium touch wheel and then tap on upper right corner of the display within 3 seconds: display will turn blank.
3 Single tap on centre of display, just above the midline: Keyboard appears.
4 Enter the password ‘2807’ and press Done and wait approx 60 seconds.
5 Jukebox will reboot and reveal Production menu.
6 Press on the IP Address button to read the IP address of the BeoSound Moment interface (Jukebox).