Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 240

238 Driving and parking
Active Stop-and-Go Assist activates automatically
when all of the following conditions are met:
You are in a traffic jam on a motorway or high-
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speed major road.
Active Distance Assist DISTRONIC is activated
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and active ( page 233).
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Active Steering Assist is activated and active
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( page 240).
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You are travelling no faster than 60 km/h.
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When Active Stop-and-Go Assist is active the
¬ status display appears in the driver display.
System limits
The system limitations of Active Distance Assist
DISTRONIC and Active Steering Assist apply to
Active Stop-and-Go Assist ( page 238).
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Active Steering Assist
▌Function of Active Steering Assist
Active Steering Assist is only available up to a
speed of 210 km/h. The system helps you to stay
in the centre of the lane by means of moderate
steering interventions. Depending on the speed
driven, Active Steering Assist uses the vehicles
ahead and lane markings as a reference.
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Depending on the country, in the lower speed
range Active Steering Assist can use the sur-
rounding traffic as a reference. If necessary,
Active Steering Assist can then also provide
assistance when driving outside the centre 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 in the driver display
Ø Grey: 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 grey in the driver
display.
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Contact 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, an optical warning is given first. Display
message 1 appears in the driver display. If the
driver still does not steer the vehicle, or gives no
confirmation to the system, a warning tone
sounds in addition to the visual warning message.