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can warn you before you leave your lane unin-
tentionally. If you do not react to the warning, a
lane-correcting application of the brakes can
bring the vehicle back into the original lane.
This function is available within a speed range
between 60 km/h and 200 km/h.
Important safety notes
If you fail to adapt your driving style, Active Lane
Keeping Assist can neither reduce the risk of an
accident nor override the laws of physics. Active
Lane Keeping Assist cannot take account of
road and weather conditions. It may not detect
traffic situations. Active Lane Keeping Assist is
only an aid. You are responsible for the distance
to the vehicle in front, for vehicle speed, for
braking in good time and for staying in lane.
Active Lane Keeping Assist cannot continuously
keep your vehicle in its lane.
G
WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
give an unnecessary warning and then
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make a course-correcting brake application
to the vehicle
neither give a warning nor intervene
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There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you. Ter-
minate the intervention in a non-critical driv-
ing situation.
The system may be impaired or may not function
if:
there is poor visibility, e.g. due to insufficient
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illumination of the road, or due to snow, rain,
fog or spray
there is glare, e.g. from oncoming traffic, the
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sun or reflection from other vehicles (e.g. if
the road surface is wet)
the windscreen is dirty, misted up, damaged
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or covered, for instance by a sticker, in the
vicinity of the camera
the radar sensors in the front or rear bumpers
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or the radiator trim are dirty, e.g. obscured by
snow
no or several, unclear lane markings are pres-
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ent for one lane, e.g. in a construction area
the lane markings are worn away, dark or cov-
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ered up, e.g. by dirt or snow
the distance to the vehicle in front is too small
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and the lane markings thus cannot be detec-
ted
the lane markings change quickly, e.g. lanes
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branch off, cross one another or merge
the road is narrow and winding
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there are highly variable shade conditions on
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the road
If no vehicle is detected in the adjacent lane and
broken lane markings are detected, no lane-cor-
recting brake application is made.
Warning vibration through the steering
wheel
A warning may be given if a front wheel passes
over a lane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 seconds.
In order that you are warned only when neces-
sary and in good time if you cross the lane mark-
ing, the system detects certain conditions and
warns you accordingly.
The warning vibration occurs earlier if:
you approach the outer lane marking on a
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bend
the road has very wide lanes, e.g. a motorway
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the system detects solid lane markings
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The warning vibration occurs later if:
the road has narrow lanes
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you cut the corner on a bend
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Lane-correcting brake application
If you leave your lane under certain circumstan-
ces, the vehicle will brake briefly on one side.
This is intended to help you return the vehicle to
the original lane.
G
WARNING
A lane-correcting brake application cannot
always bring the vehicle back into the original
lane. There is a risk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assist warns
you or makes a lane-correcting brake appli-
cation.
Driving systems
205
Z
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