Mercedes-Benz S-Class 2020 Operator's Manual page 221

Active Steering Assist
Function of Active Steering Assist
% The following function is country-dependent
and only available in conjunction with the
Driving Assistance Package.
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 speed driven, Active Steering Assist uses the
vehicles ahead and lane markings as a refer‐
ence.
% Depending on the country, in the lower
speed range Active Steering Assist can use
the surrounding traffic as a reference. If nec‐
essary, Active Steering Assist can then also
provide assistance when driving away from
the center of the lane to form a rescue lane,
for example.
When the system is actively steering, the à
symbol is shown in green in the multifunction
display.
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. During the transition
from active to passive status, the à symbol is
shown as enlarged and flashing. Once the sys‐
tem is passive, the à symbol is shown as
gray in the multifunction display.
Steering and 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
vehicle and keep it in lane. The driver must
expect a change from active to passive mode or
vice versa at any time.
Driving and parking 219
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 steer‐
ing wheel, an optical warning is given first. Dis‐
play 1 appears in the multifunction 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.
The warning is not issued, or is stopped, when
the driver gives confirmation to the system:
The driver steers the vehicle.
R
The driver presses a steering wheel button or
R
operates Touch Control.
If Active Steering Assist detects that a system
limit has been reached, a visual warning is
issued and a warning tone sounds.
Active Steering Assist is only an aid. The driver is
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good time
and for staying in lane. Before changing lanes,
the driver must make sure that the neighboring
lane is free (glance over the shoulder).