A fortnight ago, my infotainment system jammed as well. After switching it on, the system hung up with the message
"user settings are being loaded". At the same time, every time when starting the engine, I got the message that the SOS emergency system did not work and that I should visit a dealer for this.
Restarting the system and removing fuses did not help, so I made an appointment with the dealer.
Today, I tried again to reset the system without result. Then I pressed the SOS button near the mirror for a few seconds. To my surprise, a little later I heard through the speakers:
"you have disabled the SOS function manually" and then suddenly the infotainment system was available again!