Volvo S80 Owner's Manual page 176

04 Driver support
Collision Warning with Auto Brake & Pedestrian Protection*
For the sensors to work correctly, they must be
kept clear of dirt, ice and snow, and be cleaned
regularly with water and car shampoo.
NOTE
Dirt, ice and snow covering the sensors will
reduce their function and may prevent
measurement.
Limitations
04
Collision Warning with Auto Brake and Pedes-
trian Detection is active from approx. 4 km/h.
The visual warning signal (no. [1] in the illustra-
tion on page 170) may be difficult to notice in
the event of strong sunlight, reflections, when
sunglasses are being worn or if the driver is not
looking straight ahead. The warning sound
should therefore always be activated.
On slippery road surfaces the braking distance
is extended, which may reduce the capacity to
avoid a collision. In such situations the ABS
and DSTC systems will provide best possible
braking force with maintained stability.
*
174
Option/accessory, for more information, see Introduction.
NOTE
The visual warning signal can be temporarily
disengaged in the event of high passenger
compartment temperature caused by
strong sunlight for example. If this occurs
then the warning sound is activated even if
it is deactivated in the menu system.
•
Warnings may not appear if the dis-
tance to the vehicle in front is small or if
steering wheel and pedal movements
are large, e.g. a very active driving style.
WARNING
Warnings and brake interventions could be
implemented late or not at all if the traffic
situation or external influences mean that
the radar or camera sensor cannot detect a
pedestrian or a vehicle in front correctly.
The sensor system has a limited range for
pedestrians and the system therefore pro-
vides effective warnings and brake inter-
ventions at vehicle speeds up to 50 km/h.
For stationary or slow-moving vehicles,
warnings and brake interventions are effec-
tive at vehicle speeds up to 70 km/h.
Warnings for stationary or slow-moving
vehicles could be disengaged due to dark-
ness or poor visibility.
Warnings and brake interventions for
pedestrians are switched off at vehicle
speeds exceeding 80 km/h.
The collision warning system uses the same
radar sensors as adaptive cruise control. For
more information on the radar sensor and its
limitations, see page 175.
If warnings are perceived as being too frequent
or disturbing then the warning distance can be
reduced. This then leads to the system provid-
ing a warning at a later stage, which reduces
the total number of warnings; see the section
"Set warning distance" on page 173.