Mercedes-Benz C-Class Saloon 2022 Owner's Manual page 250

If the system detects that the driver has not
steered the vehicle for a considerable period of
time or has removed their hands from the steering
wheel, an optical warning is given first. Display
appears in the driver's display. If the driver still
does not steer the vehicle, or gives no confirma-
tion to the system, a warning tone sounds in addi-
tion to the visual warning message.
If the driver does not react to this warning for a
considerable period, an emergency stop is initi-
ated ( page 248).
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The warning is not issued or is stopped as soon as
the system detects that the driver has touched
the steering wheel.
The touch detection may be limited or without
function if there is no direct contact between the
hand and the steering wheel, e.g. when wearing
gloves or if there is a steering wheel cover on the
steering wheel.
If Active Steering Assist detects that a system
limit has been reached, a visual warning is issued
and a warning tone sounds.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognise
dangers ( page 226).
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System limits
Active Steering Assist has a limited steering tor-
1
que for lateral guidance. In some cases, the steer-
ing intervention is not sufficient to keep the vehi-
cle in the lane.
The system may be impaired or may not function
in the following instances:
There is poor visibility, e.g. due to snow, rain,
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fog, heavy spray, greatly varying light condi-
tions or strong shadows on the carriageway.
There is glare, e.g. from oncoming traffic,
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direct sunlight or reflections.
Driving and parking 247
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 pres-
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ent for one lane, or the markings change
quickly, forexample, in a construction area or
junctions.
The lane markings are worn away, dark or cov-
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ered 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, suchas object markers.
If transport equipment, forexample a trailer or
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bicycle rack, is attached to the trailer hitch
and the electrical connection has been cor-
rectly established.
The system does not provide assistance in the fol-
lowing conditions:
On very tight bends and when turning.
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