Trailer Mode must always be active when towing a trailer. When you connect a
trailer's electrical connection while the vehicle is in Park, Model Y
automatically engages Trailer Mode. When you disconnect the trailer's electrical
connection, Trailer Mode does not automatically disengage. To manuall
Customize how the navigation system works:
Navigation Volume: Increase or decrease the volume
of spoken navigation instructions by touching - or +,
respectively. Fully decreasing the volume mutes the
instructions. You can also mute navigation
instructions when a navigation route is active