CITROËN DS5 Owner's Handbook Manual page 122

Head-up display
System which projects information onto a
transparent strip in the field of vision of the driver so
that they do not have to take their eyes off the road.
This system operates when the engine is running
and the settings are stored when the ignition is
switched off.
1. Head-up display on/off.
2. Display height adjustment.
3. Brightness adjustment.
Displays during
operation
Once the system has been activated, the
information projected in the head-up display is:
A. The speed of your vehicle.
B. Cruise control/speed limiter
information.
C. Navigation information (according to
version).
For more information on the navigation
system, refer to the "Audio and
telematic" section.