See also:

How to insert a CD (type A)
While the ignition switch is in the “Acc” or “ON” position, hold a disc with a finger in the center hole while gripping the edge of the disc, then insert it in to the slot (with the label side up) ...

When there is no CD inserted
Properly insert a CD. Refer to “How to insert a CD (type A and C)”/“How to insert a CD(s) (type B)”. When a CD is loaded, the player will start playback of the CD, beginning with the first track. ...

Air inlet selection button
Air inlet selection button ON position (recirculation): Interior air is recirculated inside the vehicle. Push the air inlet selection button to the ON position. The indicator light will illuminate. ...