Chrysler 2014 300 SRT - Uconnect 4.3/8.4 Manual - Manual (Page 44)

Source
Touch the Source soft-key to select the desired audio
source, Disc/USB/SD Card/AUX/Bluetooth®. This
screen will time out after a few seconds and return to the
main radio screen if no selection is made.
Audio
Refer to Operating Instructions – Radio Mode for adjust-
ing the audio settings.
5
AUX MODE 43