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DRIVER SUPPORT
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* Option/accessory.
377
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. 375)
•
Limitations for camera and radar unit
(p. 417)
Distance Warning*
107
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 function is
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.
NOTE
Strong sunlight, reflections, extreme light
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.
NOTE
Distance warning is deactivated during the
time the adaptive cruise control* or Pilot
Assist* is active.
WARNING
Distance warning only reacts if the time
window to the vehicle ahead is shorter
than the preset value – the speed of the
driver's vehicle is not affected.
107
Distance Alert
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