CITROEN DS3 Owner's Handbook Manual page 217

2
On/Off and volume adjustment.
modes:
functions.
Selection of source:
Selection of FM1, FM2, FMast and AM wavebands.
loudness, sound ambience.
the MP3 folders.
Abandon current operation.
1
mode.
Selection of the previous/next MP3 folder.
artist/playlist.
Buttons 1 to 6:
Selection of a stored radio station.
7
11
12
2nd press: display of a black screen.
3rd press: return to the standard display.