CITROEN DS4 Owner's Handbook Manual page 62

Black panel (black screen)
System allowing certain screens to be switched
off for night driving.
The instrument panel remains on with the
vehicle speed, electronic or automatic gearbox
gear selected, cruise control or speed limiter
information, if in use, and the low fuel alerts as
appropriate.
If there is an alert or a change in a function
or to a setting, the black panel mode is
interrupted.
Activation
 With the vehicle lighting on, press this
button again to activate the black panel.
 Press once more to illuminate on the
various screens again.
Customising the instrument
panel colours
In the instrument panel, you can change the
colour of its dials (button A ) independently from
that of the screens (button B ).
There are five colour variants, from white to
blue.
 press the appropriate button as many times
as needed to obtain the desired colour.