I am in the same situation now. "Center Display unavailable. Driving and user settings could not be restored." After a couple of reboots, got the center console to turn on, which allowed me to turn off the car from the center console. After turning car back on (pressed brake pedal), after about 15 minutes, car now drivable and mobile app connects, but still have the "Center Display unavailable...." message. Still have MCU1, but eMMC replaced under recall some years ago. Car is a 2013 S85. Curious to know if other have experienced same and how things turned out.