CITROEN DS5 Owner's Handbook Manual page 134

Programming
Turn dial 1 to the "CRUISE" position: the
cruise control mode is selected but is not
switched on (Pause).
Set the programmed speed by accelerating
to the required speed, then press button 2
or 3 (e.g.: 70 mph (110 km/h)); the cruise
control system is activated (ON).
You can then change the programmed speed using buttons 2 and 3 :
- by + or - 1 mph (km/h) = short press,
- in steps of + or - 5 mph (km/h) = maintained press.
If storing speeds is available and activated on your vehicle, the
programmed speed will stop at the closest stored speed; refer to the
corresponding section.
Stop the cruise control system by pressing button 4: this is confirmed
in the screen (Pause).
Switch on the cruise control again with another press on button 4.
Exceeding the programmed speed
Intentional or unintentional exceeding of the programmed speed results
in flashing of this speed in the screen.
Return to the programmed speed, by means of intentional or
unintentional deceleration of the vehicle, automatically cancels the
flashing of the speed.
Exiting cruise control mode
Turn dial 1 to the "0" position: the cruise control mode is deselected.
It disappears from the screen.
Operating fault
In the event of a cruise control malfunction,
the speed is cleared resulting in flashing of the
dashes.
Have it checked by a CITROËN dealer or a
qualified workshop.
When the cruise control is switched on,
be careful if you maintain the pressure
on one of the programmed speed
changing buttons: this may result in a
very rapid change in the speed of your
vehicle.
Do not use the cruise control on slippery
roads or in heavy traffic.
On a steep descent, the cruise control
will not be able to prevent the vehicle
from exceeding the programmed speed.
On steep climbs or when towing, the
programmed speed may not be reached
or maintained.
To avoid any risk of jamming of the
pedals:
- ensure that the mat is positioned
correctly,
- never fit one mat on top of another.