2009 Toyota 4Runner Owners Manual - Page 278

3-2. Using the audio system n Lens cleaners Do not use lens cleaners. Doing so may damage the CD player. n When inserting the CDs This player can store up to six discs. NOTICE n CDs and adapters that cannot be used Do not use the following types of CDs, 3 in. (8 cm) CD adapters or Dual Disc. Doing so may damage the CD player and/or the CD insert/eject function. l CD player with external CD changer controller and AM/FM radio: CDs that have a diameter that is not 3 in. (8 cm) or 4.7 in. (12 cm) l CD player with changer and AM/FM radio: CDs that have a diameter that is not 4.7 in. (12 cm) l Low-quality and deformed CDs 3 Interior features l CDs with a transparent or translucent recording area 255