See also:

Fan speed control dial
The fan operates only when the ignition switch is turned to the “ON” position. The fan speed control dial is used to select four fan speeds. ...

Channel preset
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When “No song” is displayed (type D audio)
This message is displayed when no playable audio files are in the connected USB storage device/iPod®. Connect a USB storage device/iPod® that has playable audio files stored in it. ...