My 2022 XC60 decided this morning go mute on me. First thing i noticed was the indicator clicking was quirt, though the indicators worked fine. I then discovered that all the cars audio functions had stopped working, radio, phone, navigation, parking sensors, the lot. Called the dealer who couldn't help over the phone but booked it in for a week hence. Ive since discovered that pressing and holding the central display home button for at least ten seconds solves the problem. Haven't found this anywhere in the handbook but it works, costs nothing and might help someone else out there.