Mercedes-Benz 2016 GLE Operator's Manual page 236

Driving systems
234
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 reflections (e.g. when the road surface
is wet)
the windshield is dirty, fogged up, damaged or
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covered, for instance by a sticker, in the vicin-
ity of the camera
there are no, several or unclear lane markings
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for a lane, e.g. in areas with road construction
work
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 roadway
no vehicle is detected in the adjacent lane and
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there are broken lane markings
Warning vibration in 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 highway
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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
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.
G
WARNING
Active Lane Keeping Assist does not detect
traffic conditions or road users. In very rare
cases, the system may make an inappropriate
brake application, e.g. after intentionally driv-
ing over a solid lane marking. There is a risk of
an accident.
An inappropriate brake application may be
interrupted at any time if you steer slightly in
the opposite direction. Always make sure that
there is sufficient distance on the side for
other traffic or obstacles.
If you leave your lane, under certain circumstan-
ces the vehicle will brake briefly on one side.
This is meant to assist you in bringing the vehicle
back to the original lane.
If a lane-correcting brake application occurs,
display : appears in the multifunction display.
A lane-correcting brake application can be made
after driving over a lane marking recognized as
being solid or broken. 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 recog-
nized.