Pioneer AVIC-505 Owner's Manual page 17

As you slide the CD-ROM into the slot, it will be automatically drawn into the unit.
• Do not attempt to use discs other than a programme disc designed for use with this system. For
example, music CDs and other CD-ROMs cannot be used.
• Do not attempt to use discs which are cracked, scratched, bent or otherwise damaged.
The screen indicates that you can now install the programme (see next section).
• Your CD-ROM discs should be treated with care. See "Handling and Care of CD-ROM Discs" on
page 139 for advice on proper handling and use.