Mercedes-Benz CLA Operator's Manual page 193

front, for vehicle speed, for braking in good
time and for staying in your lane.
The Lane Keeping Assist does not keep the
vehicle in the lane.
The system may be impaired or may not
function if:
there is poor visibility, e.g. due to
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insufficient illumination of the road, or due
to snow, rain, fog or spray
there is glare, e.g. from oncoming traffic,
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the sun or reflections (e.g. when the road
surface is wet)
the windshield is dirty, fogged up, damaged
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or covered, for instance by a sticker, in the
vicinity of the camera
there are no, several or unclear lane
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markings for a lane, e.g. in areas with road
construction work
the lane markings are worn away, dark or
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covered up, e.g. by dirt or snow
the distance to the vehicle in front is too
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small and the lane markings thus cannot be
detected
the lane markings change quickly, e.g.
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lanes branch off, cross one another or
merge
the road is narrow and winding
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there are strong shadows cast on the lane
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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.
Switching on Lane Keeping Assist
Switch on Active Lane Keeping Assist using
X
the on-board computer; to do so, select
Standard or Adaptive(
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
the lane markings in the assistance
graphics display (
Y
in green.
page 205).
Y
page 203) are shown
Driving systems
When Standard is selected, no warning
vibration occurs if:
you switch on the turn signals. In this event,
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the warnings are suppressed for a certain
period of time.
a driving safety system intervenes, such as
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®
ABS, BAS or ESP .
When Adaptive is selected, no warning
vibration occurs if:
you switch on the turn signals. In this event,
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the warnings are suppressed for a certain
period of time.
a driving safety system intervenes, e.g.
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®
ABS, BAS or ESP .
you accelerate hard, e.g. kickdown.
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you brake hard.
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you steer actively, e.g. swerve to avoid an
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obstacle or change lanes quickly.
you cut the corner on a sharp bend.
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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:
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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