Mercedes-Benz C-Class Operator's Manual page 199

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
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freeway.
the system recognizes 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
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WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid
designed to assist driving. It is not a substitute
for attentive driving. In some cases, the lane-
correcting brake application is not sufficient
to bring your vehicle back to the original lane.
In such cases, you must steer the vehicle
yourself to ensure that it does not leave the
lane.
Active Lane Keeping Assist does not detect
road and traffic conditions. Always make sure
that there is sufficient distance to the side for
other traffic or obstacles. In rare cases,
unclear markings or particular structures on
the roadway can be recognized as solid lane
markings. An inappropriate brake application,
e.g. after intentionally driving over a solid lane
marking, may be interrupted at any time by
steering slightly in the opposite direction.
Active Lane Keeping Assist cannot take
weather conditions into account.
You are responsible for the driving at
appropriate speeds, braking in good time, and
steering correctly. Always adapt your driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise,
you may fail to recognize dangers in time,
cause an accident and injure yourself and
others.
If you leave your lane under certain
circumstances the vehicle will brake briefly
on one side. This is meant to assist you in
bringing the vehicle back to the original lane.
This function is available in the range between
40 mph and 120 mph (60 km/h and
200 km/h).
A lane-correcting brake application can only
be made after driving over a solid,
recognizable lane marking. Before this, a
warning must be given by means of
intermittent vibration in the steering wheel.
In addition, a lane with lane markings on both
sides must be recognized. The brake
application also slightly reduces vehicle
speed.
If a lane-correcting brake application occurs,
the following, for example, appears in the
multifunction display:
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A further lane-correcting brake
application can only occur after your
vehicle has returned to the original lane.
No lane-correcting brake application occurs
if:
you clearly and actively steer, brake or
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accelerate.
you cut the corner on a sharp bend.
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you switch on the turn signals.
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a driving safety system intervenes, e.g.
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ESP ® , PRE-SAFE
Spot Assist.
you have adopted a sporty driving style with
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high cornering speeds or high rates of
acceleration.
®
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the transmission is not in position D.
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a loss of tire pressure or a defective tire has
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been detected and displayed.
I n f o r ma t i o n P r o v i d e d b y :
Driving systems
® Brake or Active Blind
Z
197