Mercedes-Benz CLA Operator's Manual page 178

176 Driving and parking 176
tone sounds in addition to the visual warning mes-
sage.
If the driver still does not respond to the warning,
the Beginning Emergency Stop message appears
in the Instrument 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 the
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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
A A ctiv ctive Lane Chang e Lane Change Assist e Assist
F F unction of A unction of Activ ctive Lane Chang e Lane Change Assist e Assist
Active Lane Change Assist supports the driver
when changing lanes by applying steering torque
if the driver activates a turn signal indicator.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognize
dangers ( page 157).
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Assistance when changing lanes is provided if all
the following conditions are met:
You are driving on a freeway or road with mul-
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tiple lanes in the direction of travel.
The neighboring lane is separated by a broken
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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
a er the driver has activated the turn signal indi-
cator. This is shown to the driver with a green
arrow next to the ± steering wheel symbol.
The Lane Change to the Left message, for exam-
ple, 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 lane change assistance starts, the turn sig-
nal indicator is automatically activated along with
the display in the Instrument Display.
If the assistance graphic is shown when changing
lanes, an additional arrow appears in it pointing
towards the adjacent lane ( page 167).
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If a lane change is not possible, the arrow is faded
out a er a few seconds and a new lane change
must be initiated. An immediate lane change is