Steering wheel controls

Radio: selecting the previous/next
stored station.
USB: selecting a genre / artist / folder from the classification list.
Selecting the previous/next item in the menu.
Radio: automatic
station search up the scale.
CD / MP3 / USB: selecting the next track.
CD / USB: press and hold: fast forward.
Jump to list.
Change audio source.
Confirm selection.
Answering/ending a call.
Press for more than 2 seconds: access the telephone menu.
Radio: automatic
station search down the scale.
CD / MP3 / USB: selecting the previous track.
CD / USB: press and hold: fast rewind.
Jump to list.
Increase volume.
Decrease volume.
Mute: press the volume up and volume down buttons at the same time.
Restoring sound: press one of the volume buttons.
Test yourself
A quick Citroen DS3 quiz: every answer comes with an explanation and a link to the manual page.