PEUGEOT 208 Handbook page 252

06 MUSIC
USING THE AUXILIARY INPUT (AUX)
Cable not supplied
Connect the portable device (MP3 player...) to the auxiliary JACK
socket using an audio cable.
250
Press the MODE button until the RADIO display
is obtained.
Select changing the source.
Select the AUXILIARY source. Y
First adjust the volume of your portable device (to a high level). Then
adjust the volume of your audio system.
Display and management of the controls are via the portable device.