Adaptive Cruise Control; Switching Between The Types Of Cruise Control; Principles Of Operation - CITROEN C4 Spacetourer Handbook

When the cruise control is switched on, be
careful if you maintain the pressure on one
of the programmed speed modification
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.
When descending a steep hill, the cruise
control system cannot prevent the vehicle
from exceeding the programmed speed.
On steep climbs or when towing, the
programmed speed may not be reached
or maintained.
The use of mats not approved by
CITROËN may interfere with the operation
of the cruise control.
To avoid any risk of jamming of the pedals:
- ensure that mats are secured correctly,
- never fit one mat on top of another.

Adaptive cruise control

The system allows the speed of
your vehicle to be maintained at the
setting you have made, and also to
respect the inter-vehicle time that
you have selected between your
vehicle and the one in front, when
the situation permits it.
Switching between the
types of cruise control
The choice between "adaptive" and "standard"
cruise control is made in the Driving menu.
F Turn the cruise control wheel to
the "CRUISE" position.
F In the Driving menu, select the Driving
functions tab and then Active cruise
control to activate or deactivate adaptive
cruise control.
For more information on the Cruise
control, refer to the corresponding
section.

Principles of operation

Using radar with a range of about 100 metres,
located at the front of the vehicle, this system
detects a vehicle travelling in front of your
vehicle.
It automatically adapts the speed of your
vehicle to that of the vehicle in front.
If the vehicle in front is travelling more slowly,
the system progressively reduces the speed of
your vehicle using just engine braking (as if the
driver had pressed the "-" button).
If your vehicle is too close to the vehicle in
front or is approaching it too quickly, adaptive
cruise control is automatically deactivated.
The driver is then alerted by an audible signal
accompanied by a message.
If the vehicle in front accelerates or changes
lane, the adaptive cruise control gradually
accelerates your vehicle to return to the
programmed speed.
If the driver operates the direction indicator to
the left (left-hand drive) or to the right (right-
hand drive), to overtake a slower vehicle, the
adaptive cruise control allows your vehicle to
temporarily approach the vehicle in front to
assist the overtaking manoeuvre, though never
exceeding the programmed speed.
The adaptive cruise control operates
by day and at night, in fog or moderate
rainfall.
Driving
6
151