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If the system reaches a system limitation or the
driver has not steered the vehicle for a consider‐
able period of time or has removed their hands
from the steering wheel, the system will,
depending on the situation, fir st alert the driver
with a visual warning. Display
1 appears in the
multifunction display. If the driver still does not
steer the vehicle, or has still not taken hold of
the steering wheel, a repeated warning tone
sounds in addition to the visual warning mes‐
sage to remind the driver to take control of the
vehicle.
The warning message does not appear or disap‐
pears if one of the following conditions are met:
R
The driver steers the vehicle.
R
The driver presses a steering wheel button or
operates Touch Control.
Active Steering Assist is only an aid. The dr iver is
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good time
and for staying in lane. Before changing lanes,
the driver must make sure that the neighboring
lane is free (glance over the shoulder).
System limitations
Active Steering Assist has a limited steering tor‐
que for lateral guidance. In some cases, the
steering intervention is not sufficient to keep the
vehicle in the lane or to drive past exits. Active
Steering Assist cannot provide the driver with
steering assistance at traffic circles, T-intersec‐
tions, intersections, toll stations or tur ns, for
example.
The system may be impaired or may not function
in the following instances:
R
In snow, rain, fog, heavy spray, if there is
glare, direct sunlight, greatly varying ambient
light, reflections or strong shadows on the
road.
R
Insufficient road illumination.
R
The windshield in the area of the camera is
dirty, fogged up, damaged or covered.
R
Absence of lane markings, or several unclear
lane markings, or if the markings change rap‐
idly.
R
The distance to the vehicle in front is too
small and the lane markings thus cannot be
detected.
R
The roadway is narrow and winding.
R
Obstacles on the lane or projecting out into
the lane.
The system does not provide assistance in the
following conditions:
R
On tight bends, traffic circles and when turn‐
ing.
R
When actively changing lane without switch‐
ing on the turn signal.
&
WARNING Risk of accident if Active
Steering Assist unexpectedly stops func‐
tioning
If the system limitations of Active Steering
Assist are reached there is no guarantee that
the system will remain active or will keep the
vehicle in lane.
#
Always keep your hands on the steering
wheel and observe the traffic carefully.
#
Always steer the vehicle paying atten‐
tion to traffic conditions.
184
Driving and parking
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