Mercedes-Benz A-Class 2021 Operator's Manual page 171

Ø (red): system limits detected
R
Ø (white, red hands): "hands on the steer‐
R
ing wheel" prompt
% 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 in
the multifunction display.
% Depending on the selected vehicle settings,
Active Steering Assist may be unavailable.
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.
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, display 1 appears. If the driver still
does not steer the vehicle, a warning tone
sounds in addition to the visual warning mes‐
sage.
If the driver does not react to the warning for a
considerable period, the system can initiate an
emergency stop ( page 170).
/
The warning is not issued or is stopped when the
driver gives confirmation to the system:
The driver steers the vehicle.
R
Driving and parking 169
Depending on the country: the driver
R
presses a steering wheel button or 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.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recog‐
nize dangers ( page 151).
/
System limits
Active Steering Assist has a limited steering tor‐
que for lateral guidance. In some cases, the
steering intervention is not sufficient to keep the
vehicle in the lane or to drive through exits.
The system may be impaired or may not function
in the following instances:
There is poor visibility, e.g. due to snow, rain,
R
fog, heavy spray, greatly varying ambient
light or strong shadows on the road.
There is glare, e.g. from oncoming traffic,
R
direct sunlight or reflections.
Insufficient road illumination.
R