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218 Driving and parking
System limits
The system limitations of Active Distance Assist
DISTRONIC and Active Steering Assist apply to
Active Stop-and-Go Assist (
page 218).
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Active Steering Assist
▌Function of Active Steering Assist
Active Steering Assist is only available up to a
speed of 130 mph (210 km/h). The system helps
you to stay in the center of the lane by means of
moderate steering interventions. Depending on
the vehicle's speed, Active Steering Assist uses
the vehicles ahead and lane markings as a refer-
ence.
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Depending on the country, Active Steering
Assist can use the surrounding traffic as a ref-
erence in the lower speed range. If necessary,
Active Steering Assist can then also provide
assistance outside the center of the lane.
If the detection of lane markings and vehicles
ahead is impaired, Active Steering Assist switches
to passive mode. The system provides no support
in this case.
Permanent status display on the driver's display
Ø Gray: activated and passive
Ø Green: activated and active
Ø Red, flashing: prompt to the driver to
actively confirm or transition from active to
passive status, system limit detected
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During the transition from active to passive
status, the Ø symbol is shown as enlarged
and flashing. Once the system is passive, the
Ø symbol is shown as gray on the driver's
display.
Touch detection
The driver is required to keep their hands on the
steering wheel at all times and be able to inter-
vene at any time to correct the course of the vehi-
cle and keep it in lane. The driver must expect a
change from active to passive mode or vice versa
at any time.
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, a visual warning is given first. Display
appears on 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 220).
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The warning is not issued or is stopped as soon as
the system detects that the driver is touching the
steering wheel.
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