Mercedes-Benz A-Class 2021 Operator's Manual page 173

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 in the multifunc‐
tion 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.
If the driver still does not respond to the warn‐
ing, the Beginning Emergency Stop
appears in the multifunction display. If the driver
still does not respond, Active Distance Assist
DISTRONIC reduces the speed. The vehicle is
decelerated in stages to a standstill.
Depending on the country, at speeds below
40 mph (60 km/h) the hazard warning lights
switch on automatically.
When the vehicle is stationary, the following
actions are carried out:
The vehicle is secured with the electric park‐
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ing brake.
Active Distance Assist DISTRONIC is ended
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The vehicle is unlocked.
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If possible, an emergency call is placed to
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the Mercedes-Benz emergency call center
The driver can cancel the deceleration at any
time by performing one of the following actions:
Steering
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Braking or accelerating
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Deactivating Active Distance Assist
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DISTRONIC
message
Active Lane Change Assist
Function of Active Lane Change Assist
Active Lane Change Assist supports the driver
when changing lanes by applying steering torque
if the driver operates a turn signal indicator.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recog‐
nize dangers ( page 151).
/
Assistance when changing lanes is provided if all
the following conditions are met:
You are driving on a freeway or road with
R
multiple lanes in the direction of travel.
Driving and parking 171
The neighboring lane is separated by a bro‐
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ken lane marking.
No vehicle is detected in the adjacent lane.
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The vehicle speed is between 50 mph
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(80 km/h) and 110 mph (180 km/h).
Active Lane Change Assist is switched on in
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the multimedia system.
Active Steering Assist is activated and active.
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If no vehicle is detected in the adjacent lane and
a lane change is permitted, the lane change
begins after the driver has activated the turn sig‐
nal indicator. This is shown to the driver with a
green arrow next to the ± steering wheel
symbol. The Lane Change to the Left
for example, also appears. If Active Lane Change
Assist has been activated with the turn signal
indicator but a lane change is not immediately
possible, a gray arrow appears next to the ±
steering wheel symbol, which remains green.
When the lane change assistance starts, the turn
signal indicator is automatically activated along
with the display in the multifunction display.
message,