CITROEN Jumpy Multispace Owner's Handbook Manual page 236

05 USB BOX
USING THE AUXILIARY INPUT (AUX)
JACK socket or USB port (according to vehicle)
The auxiliary input, JACK or USB, allows the connection of a
portable device (MP3 player...).
Do not connect a device to both the JACK socket and the USB
port at the same time.
Connect the portable device
(MP3 player...) to the JACK socket or
to the USB port, using a suitable cable
(not supplied).
Press the SOURCE button several
times in succession and select AUX.
9.72
ADJUSTING THE VOLUME OF
THE AUXILIARY SOURCE
First adjust the volume of your portable device.
Then adjust the volume of your audio
system.
The display and control is via the portable device.