Mercedes-Benz C-Class 2014 Owner's Manual page 270

The system may be impaired or may not func-
tion if:
there is poor visibility, e.g. due to insuffi-
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cient 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 reflection from other vehicles
(e.g. if the road surface is wet)
the windscreen is dirty, misted up, dam-
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aged or covered, for instance by a sticker,
in the vicinity of the camera
if the radar sensors in the front or rear
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bumpers or the radiator grille are dirty, e.g.
obscured by snow
no, or several, unclear lane markings are
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present for one lane, e.g. in a construction
area
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 highly variable shade conditions
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on the road
If no vehicle is detected in the adjacent lane
and broken lane markings are detected, no
lane-correcting brake application is made.
Warning vibration through 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 steer-
ing wheel for up to 1.5 seconds.
Lane-correcting brake application
If you leave your lane under certain circum-
stances, the vehicle will brake briefly on one
side. This is intended to help you return the
vehicle 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 dis-
play. The brake application also slightly
reduces driving speed.
This function is available in the range between
60 km/h and 200 km/h.
A lane-correcting brake application can be
made after driving over a lane marking rec-
ognised as being solid or broken. Before this,
a warning must have been issued by means of
intermittent vibration through the steering
wheel. In addition, a lane with lane markings
on both sides must be recognised.
In the case of a broken lane marking being
detected, a lane-correcting brake application
can only be made if a vehicle has been detec-
ted in the adjacent lane. Oncoming vehicles,
overtaking vehicles and vehicles in adjacent
lanes can be detected.
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A further lane-correcting brake applica-
tion can only occur after your vehicle has
returned to the original lane.
Driving systems
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