Volvo S80 Owner's Manual page 148

WARNING
• Adaptive cruise control is not a collision
avoidance system. The driver is always re-
sponsible for applying the brakes if the sys-
tem does not detect another vehicle.
• Adaptive cruise control does not react to
slow moving or stationary vehicles.
The distance to the vehicle ahead (in the
same lane) is measured by a radar sensor.
Your vehicle's speed is regulated by acceler-
ation and braking. The brakes may emit a
sound when they are being modulated by the
adaptive cruise control system. This is nor-
mal.
WARNING
The brake pedal moves when the adaptive
cruise control system modulates the
brakes. Do not rest your foot under the
brake pedal.
The adaptive cruise control system is
designed to follow the vehicle ahead of you
in the same lane, at a set time interval.
If the radar sensor has not detected a vehicle
ahead, the system will then attempt to main-
tain the set speed. This is also the case if the
speed of the vehicle ahead exceeds the
speed that you have set.
The adaptive cruise control system is
designed to smoothly regulate speed. How-
ever, the driver must apply the brakes in situ-
ations that require immediate braking. This
applies when there are great differences in
speed between vehicles, or if the vehicle
ahead brakes suddenly.
WARNING
Due to limitations in the radar sensor, brak-
ing may occur unexpectedly or not at all,
see page 148.
Adaptive cruise control can only be activated
at speeds above 20 mph (30 km/h). If speed
falls below 20 mph (30 km/h) or if engine
speed (rpm) becomes too low, adaptive
cruise control disengages and will no longer
modulate the brakes. In situations when
adaptive cruise control cannot be activated
Cruise Control Unavailable is shown in the
display, see page 151.
WARNING
When adaptive cruise control disengages,
the brakes will not be modulated automati-
cally. The driver must assume full control
over the vehicle.
04 Comfort and driving pleasure
Adaptive Cruise Control–ACC
Warning light–driver braking required
Adaptive cruise control has a braking capac-
ity that is equivalent to approximately 30% of
the vehicle's total braking capacity. In situa-
tions requiring more brake force than ACC
can provide, if the driver does not apply the
brakes, an audible signal will sound and a red
warning light will illuminate in the windshield.
NOTE
The red warning light may be difficult to see
in strong sunlight or when sunglasses are
being worn.
WARNING
Cruise control only warns of vehicles de-
tected by the radar sensor, see page 148. In
some cases there may be no warning or the
warning may be delayed. The driver should
always apply the brakes when necessary.
Automatic deactivation
Adaptive cruise control is linked to other sys-
tems such as the stability and traction con-
trol system (DSTC). If any of these systems
are not functioning properly, adaptive cruise
control is automatically deactivated.
In the event of automatic deactivation a sig-
nal will sound and the message
trol Canceled
Cruise Con-
is shown in the display. The
04
147