See also:

DISC Button
Pressing the DISC button will allow you to switch from AM/FM modes to Disc modes. ...

Supported Medium Formats (File Systems)
The medium formats supported by the radio are ISO 9660 Level 1 and Level 2 and includes the Joliet extension. When reading discs recorded using formats other than ISO 9660 Level 1 and Level 2, th ...

Controlling The iPod Or External USB Device Using Radio Buttons
To get into the iPod /USB/MP3 control mode and access a connected audio device, either press the “AUX” button on the radio faceplate or press the VR button and say USB or Switch to USB . Onc ...