Mercedes-Benz C-Class Wagon Owner's Manual page 216

Insufficient road illumination.
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The windscreen is dirty, misted up, damaged
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or covered in the vicinity of the camera, e.g.
by a sticker.
No, or several, unclear lane markings are
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present for one lane, or the markings change
quickly, for example, in a construction area
or junctions.
The lane markings are worn away, dark or
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covered up, e.g. by dirt or snow.
If the distance to the vehicle in front is too
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short and thus the lane markings cannot be
detected.
The road is narrow and winding.
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There are obstacles on the lane or projecting
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out into the lane, such as object markers.
If transport equipment, for example a trailer
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or bicycle rack, is attached to the trailer
hitch and the electrical connection has been
correctly established.
The system does not provide assistance in the
following conditions:
On very tight bends and when turning.
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When crossing junctions.
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At roundabouts or toll stations.
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When actively changing lane without switch‐
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ing on the turn signal indicator.
When the tyre pressure is too low.
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& WARNING Risk of accident if Active
Steering Assist unexpectedly stops func‐
tioning
If the system limits of Active Steering Assist
are reached there is no guarantee that the
system will remain active or will keep the
vehicle in lane.
Always keep your hands on the steering
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wheel and observe the traffic carefully.
Always steer the vehicle paying atten‐
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tion to traffic conditions.
& WARNING Risk of accident if Active
Steering Assist unexpectedly intervenes
The detection of lane markings and objects
may malfunction and cause unexpected
steering interventions.
Driving and parking 213
Steer according to traffic conditions.
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Activating/deactivating Active Steering
Assist
Requirements:
®
ESP is activated, but is not intervening.
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Active Distance Assist DISTRONIC is activa‐
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ted.
Multimedia system:
© Settings Assistance
4 5 5
Driving
5
Select Ø Act. Steering Asst.
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Function of Active Emergency Stop Assist
Depending on vehicle equipment, Active Emer‐
gency Stop Assist uses touch sensors or detects
steering movements when monitoring the steer‐
ing wheel. If the system detects that the driver is
no longer holding the steering wheel, it can ini‐
tiate an emergency stop, if necessary.