Lane-Correcting Brake Application; Warning Vibration In The Steering Wheel - Mercedes-Benz S-Class Operator's Manual

Driving systems
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G WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
give an unnecessary warning and then
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make a course-correcting brake application
to the vehicle
not give a warning or intervene
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There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you.
Terminate the intervention in a non-critical
driving situation.
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
the radar sensors in the front or rear
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bumpers or the radiator trim are dirty, e.g.
obscured by snow
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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If no vehicle is detected in the adjacent lane
and broken lane markings are detected, no
lane-correcting 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
circumstances 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
application.
If a lane-correcting brake application occurs,
display : appears in the multifunction
display. The brake application also slightly
reduces vehicle 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
recognized as being solid or broken. Before
this, a warning must be given by means of
intermittent vibration in the steering wheel.