Kia RIO Owner's Manual page 256

Features of your vehicle
AUX
AUX is used to play external MEDIA cur-
rently connected with the AUX terminal.
AUX mode will automatically start when
an external device is connected with the
AUX terminal.
If an external device is connected, you
can also press the MEDIA
to AUX mode.
❈ AUX mode cannot be started unless
there is an external device connected
to the AUX terminal.
4 170
key to change