Mercedes-Benz MY17 c-class Operator's Manual page 200

Driving systems
198
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 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
the radar sensors in the front or rear bumpers
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or the radiator trim are dirty, e.g. obscured by
snow
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 strong shadows cast on the road
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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 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.
Lane-correcting brake application
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.
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.
If a lane-correcting brake application occurs,
display : appears in the multifunction display.
The brake application also slightly reduces vehi-
cle speed.
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 be made
after driving over a lane marking detected 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.
In the case of a broken lane marking being
detected, a lane-correcting brake application
can only be made if a vehicle has been detected
in the adjacent lane. Oncoming vehicles, over-
taking vehicles and vehicles in adjacent lanes
can be detected.
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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 accel-
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erate.
you cut the corner on a sharp bend.
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you have switched on the turn signal.
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a driving safety system intervenes, e.g. ESP
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®
PRE-SAFE Brake or Active Blind Spot Assist.
®
,