CITROEN C4 Handbook page 120

Driving
► Pressing 2-I I> or 4-OK again will reactivate
cruise control (green).
Cruise control operation is also
temporarily interrupted (pause):
– by pressing the brake pedal.
– automatically, if the electronic stability
control (ESC) system is triggered.
– by shifting to neutral or engaging reverse
gear.
– by using the electric parking brake.
Modifying the speed setting
The cruise control must be active.
To change the speed setting using the vehicle's
current speed:
► For steps of +/- 1 mph (1 km/h),
make successive short presses upwards/
downwards on 3 to increase/decrease.
► For steps of +/- 5 mph (5 km/h), press and
hold upwards/downwards on 3 to increase/
decrease.
Prolonged pressing and holding
upwards/downwards on 3 causes a very
rapid change in vehicle speed.
As a precaution, we recommend setting
a cruise speed fairly close to the current
speed of your vehicle, to avoid any sudden
acceleration or deceleration of the vehicle.
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To change the speed setting using the speed
suggested by the Road signs recognition
displayed on the instrument panel:
– When passing the sign:
► Press 4-OK to save the suggested speed.
This value is then immediately shown as the new
speed setting on the instrument panel.
– After passing the sign:
► Press 4-OK. The message "OK?" is
displayed to confirm the request to save.
► Press 4-OK again to save the suggested
speed. The new speed setting value is displayed
on the instrument panel.
Off
► Press 1: the cruise control information display
disappears.
Malfunction
In the event of a malfunction, dashes are
displayed flashing and then fixed instead of the
speed setting.
Have it checked by a CITROËN dealer or a
qualified workshop.
Highway Driver Assist
Only available on versions with the EAT8
automatic gearbox and drive selector.
This system automatically adjusts the speed
and corrects the trajectory of the vehicle, using
Adaptive cruise control with Stop&Go function in
conjunction with Lane Positioning Assist.
These two functions must be activated and in
operation.
For more information on Adaptive cruise
control and Lane Positioning Assist, refer to
the corresponding sections.
The system assists the driver by acting
on the steering, acceleration and braking
within the physical limits and capacities of the
vehicle. Certain road infrastructure elements
or vehicles in the surroundings may not be
properly seen or may be poorly interpreted by
the camera and radar, resulting in an
unexpected change in direction, a lack of
steering correction and/or inappropriate
management of acceleration or braking.
Primarily designed for driving on main
roads and motorways, this system only
works with moving vehicles driving in the
same direction as your vehicle.