The system may be impaired or may not
function if:
R
there is poor visibility, e.g. due to
insufficient illumination of the road, or due
to snow, rain, fog or spray.
R
there is glare, e.g. from oncoming traffic,
the sun, or reflection from other vehicles.
R
the windshield is dirty, fogged up or
covered, for instance by a sticker, in the
vicinity of the camera.
R
several or no lane markings for a single lane
are present.
R
the lane markings are worn away, dark or
covered up, e.g. by dirt or snow.
R
the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected.
R
the lane markings on the road are unclear,
e.g. near roadworks.
R
the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge.
R
the road is narrow and winding.
Lane Keeping Assist cannot detect road and
traffic conditions. It is not a substitute for
attentive driving. You are responsible for the
vehicle's speed, 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.
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
necessary and in good time if you cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlier if:
R
you approach the outer lane marking on a
bend.
R
the road has very wide lanes, e.g. a
freeway.
R
the system recognizes solid lane markings.
The warning vibration occurs later if:
R
the road has narrow lanes.
R
you cut the corner on a bend.
No warning vibration occurs if:
R
you clearly and actively steer, brake or
accelerate.
R
you cut the corner on a sharp bend.
R
a driving safety system intervenes, e.g.
ABS, BAS or ESP
®
.
R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
Switching on Lane Keeping Assist
X
Activate Lane Keeping Assist using the on-
board computer (
Y
page 387).
Symbol
:
appears in the multifunction
display.
If your speed exceeds 40 mph (60 km/h)
and lane markings are detected,
symbol
:
is highlighted in green. Lane
Keeping Assist is ready for use.
Active Driving Assistance package
General notes
i
The Active Driving Assistance package is
only available on vehicles without HYBRID.
The Active Driving Assistance package
consists of DISTRONIC PLUS (
Y
page 336),
366
Driving systems
Driving
and
parking
