CITROEN DS4 Owner's Handbook Manual page 230

Cruise control
System which automatically maintains the
speed of the vehicle at the value programmed
by the driver, without any action on the
accelerator pedal.
Operation
The cruise control is switched on manually: it
requires a minimum vehicle speed of 25 mph
(40 km/h) and engagement of:
- fourth gear on the manual gearbox,
- second gear on the electronic gearbox
system or automatic gearbox, in sequential
driving mode,
- position A on the electronic gearbox
system or D on an automatic gearbox.
The cruise control is switched off manually
or by pressing the brake or clutch pedal or
on triggering of the ESP system for safety
reasons.
It is possible to exceed the programmed speed
temporarily by pressing the accelerator pedal.
To return to the programmed speed, simply
release the accelerator pedal.
Switching off the ignition cancels any
programmed speed value.
Steering mounted controls
The functions of this system are grouped
together on the steering mounted controls.
1. Cruise control mode selection dial.
2. Speed programming/value decrease
button.
3. Speed programming/value increase button.
4. Cruise control off/resume button.
5. Memorised speeds display button.
(see "Memorising speeds")
Displays in the instrument panel
The programmed information is grouped
together in the instrument panel screen.
6. Cruise control off/resume indication.
7. Cruise control mode selection indication.
8. Programmed speed value.
9. Selecting a stored speed.
(see "Storing speeds")
The cruise control system cannot, in any
circumstances, replace the need to respect speed
limits, nor can it replace the need for vigilance and
responsibility on the part of the driver.
You are advised to keep your feet near the pedals
at all times.