See also:

Commands
The Voice Command system understands two types of commands. Universal commands are available at all times. Local commands are available if the supported radio mode is active. ...

Winter Operation4
When operating the system during the winter months, make sure the air intake, located directly in front of the windshield, is free of ice, slush, snow, or other obstructions. ...

Listen To An Audio Source On Channel 2 While A Video Is Playing On Channel 1
Ensure the Remote Control and Headphone switch is on Channel 2. ...