Volvo XC90 Recharge Owner's Manual page 398

DRIVER SUPPORT
Limitations of Driver Alert Control
The Driver Alert Control (DAC) function may
have limitations in certain situations.
In some cases the system may issue a warn-
ing despite driving ability not deteriorating, for
example:
in strong side winds
•
on rutted road surfaces.
•
WARNING
In some cases, driving behaviour is not
affected despite driver fatigue – e.g. when
using the Pilot Assist* function – resulting
in the driver not getting a warning from
DAC.
It is therefore important to always stop and
take a break at the slightest feeling of fati-
gue, regardless of whether the function has
given a warning.
NOTE
This function uses the car's camera and
radar units, which have certain general lim-
itations.
Related information
Driver Alert Control (p. 394)
•
Limitations for camera and radar unit
•
(p. 437)
105 Distance Alert
396
105
Distance Warning*
The Distance Warning function can assist the
driver to notice that the time interval to the
vehicle ahead may be too short. This requires
the car to be equipped with a head-up dis-
play* to be able to display Distance Warning.
Distance Warning symbol on the windscreen with
head-up display.
In cars equipped with head-up display, a sym-
bol is shown on the windscreen for as long as
the time interval to the vehicle ahead is shorter
than the preset value. However, this assumes
that the Show Driver Support
activated via the settings in the car's menu
system.
Distance warning is active at speeds
above 30 km/h (20 mph) and only reacts to
the vehicle ahead travelling in the same direc-
tion. No distance information is provided for
oncoming, slow or stationary vehicles.
Warning light for distance warning is shown on the
windscreen.
Even if the car is not equipped with a head-up
display, a warning light appears on the wind-
screen and shines steadily if the time interval
to the vehicle in front is shorter than a preset
value.
NOTE
Strong sunlight, reflections, extreme light
function is
contrasts, the use of sunglasses, or if the
driver is not looking straight ahead may
make the visual warning signal in the wind-
screen difficult to recognise.
* Option/accessory.