Volvo XC90: Audio, media and internet / HD Radio™ sub-channels
In many cases, a main HD Radio station (FM wavebands only) will also have sub-channels
offering additional types of programming or music.
Sub-channels

Example of an HD Radio station with sub-channels
If any sub-channels are available, they will listed below the main channel on
the screen. In this example, WILD-FM HD2 is a sub-channel.
Selecting sub-channels
To listen to a station's sub-channel(s), tap the station on the screen or press
the forward/ back arrow keys on the right-side steering wheel keypad or below the
screen.
Sub-channels can also be saved as radio favorites.
If you tap a sub-channel favorite, it may take up to 6 seconds before
the channel becomes audible. If you tap a station while you are out of digital range
of the transmitter, No reception will be displayed.
HD Radio is deactivated when the car leaves the factory.
When listening to an HD Radio station and driving through areas with weak HD
signals (fringe areas), you may experience that the radio repeatedly switches between
analog/digital and digital/analog reception...
Limitations
Main channel vs. sub-channels (FM only): The main channel is the
only channel that can receive in hybrid mode (both digital and analog)...
Other information:
(Not available on all models.)
The spare wheel is a Temporary Spare and can be used to temporarily replace
a punctured tire on one of the vehicle's regular wheels.
The spare wheel is only intended for temporary use. Replace it with a normal
wheel as soon as possible...
(Option/accessory.)
The Distance Alert function can help the driver become aware if the time interval
to the vehicle in front is too short. The vehicle must be equipped with a head-up
display* in order to display Distance Alert.
Symbol for Distance Alert on the windshield with head-up display
In vehicles equipped with a head-up display, a symbol will be displayed on the
windshield as long as t..