Automatic Lane Recognition - Mercedes-Benz Series 218 Coupe Introduction Into Service Manual

Automatic lane recognition with (code 476)
The automatic lane recognition function detects
when the vehicle unintentionally drives over lane
markings and warns the driver in certain situations
through vibrations at the steering wheel.
Automatic lane recognition is activated in the
"Assistance" menu on the instrument cluster.
The status indicator on the instrument cluster lights
up yellow when the system is switched on but not
yet ready to issue warnings. As soon as the system
is ready to issue warnings, the status indicator
lights up green.
Assistance is provided by the automatic lane recog-
nition function in the speed range of 60 to
270 km/h. An additional prerequisite is a lane
width of 2.5 to 4.6 m and a curve radius of
r > 150 m. The automatic lane recognition function
monitors the area in front of the vehicle using the
multifunction camera. The system takes measure-
ments of the lane markings on the road. From the
recorded image sequences and the measurements
of the road markings it calculates the position of the
vehicle within the lane and the path of the lane
itself.
Illustration of principle
a The vehicle is located in the lane
b The vehicle crosses an outer lane marking. Warning
through steering wheel vibration
– This printout will not be recorded by the update service. Status: 09 / 2010 –

Automatic lane recognition

If there are multiple markings on the road, the
innermost marking acts as the reference point. On
the basis of this data, the multifunction camera can
determine whether the driver is crossing a lane
marking.
When the automatic lane recognition function
detects that one of the front wheels is touching or
crossing a lane marking, it warns the driver that he
or she is leaving the lane unintentionally. The
warning is given by actuating a vibration motor in
the steering wheel which provides the driver with a
haptic warning by intermittently vibrating the
steering wheel.
Suppression of the warning
Under the following conditions, the system detects
that the vehicle is crossing a lane marking but
output of a warning message is suppressed:
• When turn signaling
• During driver activities, through evaluation of
steering wheel movements, braking requests
and accelerator pedal position
• During sporty cornering (cutting corners)
• During active control interventions by braking
assistance systems
c The driver steers the vehicle back into the lane
Introduction of the New CLS-Class, Model Series 218 Coupe
P54.32-8346-77
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