CITROEN DS3 Owner's Handbook Manual page 176

Programming
You do not have to switch the speed limiter on
in order to set the speed.
You can then change the programmed speed using buttons 2 and 3 :
- by + or - 1 mph (km/h) = short press,
- by + or - 5 mph (km/h) = long press,
- in steps of + or - 5 mph (km/h) = maintained press.
Switch the speed limiter on by pressing button 4 .
Switch the speed limiter off by pressing button 4 : the display
confirms that it has been switched off (PAUSE).
Switch the speed limiter back on by pressing button 4 again.
Exceeding the programmed speed
Pressing the accelerator pedal to exceed the programmed speed will not have
any effect unless you press the pedal firmly past the point of resistance .
The speed limiter is deactivated temporarily and the programmed speed,
which is still displayed, flashes.
Returning to the programmed speed, by means of intentional or
unintentional deceleration of the vehicle, automatically cancels the
flashing of the programmed speed.
Turn thumb wheel 1 to the "LIMIT"
position: the speed limiter mode is
selected but is not switched on (PAUSE).
Set the speed value by pressing button 2
or 3 (e.g.: 55 mph (90 km/h)).
Leaving limiter mode
Turn thumb wheel 1 to the "0" position:
the speed limiter mode is deselected. The
display returns to the distance recorder.
Operating fault
In the event of a speed limiter fault, the speed
is cleared resulting in flashing of the dashes.
Have it checked by a CITROËN dealer or a
qualified workshop.
On a steep descent or in the event of
sharp acceleration, the speed limiter will
not be able to prevent the vehicle from
exceeding the programmed speed.
To avoid any risk of jamming of the
pedals:
- ensure that the mat is positioned
correctly,
- do not fit one mat on top of another.