Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 256

254 Driving and parking
If a vehicle is detected in the monitoring range,
the red warning lamp lights up in the correspond-
ing outside mirror.
If a vehicle occupant pulls the door handle on the
side of the warning, a warning tone sounds twice
and the ambient lighting in the respective door
and the warning lamps in the corresponding out-
side mirror flash red.
Vehicles with MBUX Interior Assistant: the visual
warning begins as soon as the hand of a vehicle
occupant moves in to the area of the door.
%
Vehicles with ambient lighting or active ambi-
ent lighting: theWarning assistance
ambient lighting can be activated and deacti-
vated ( page 162).
/
%
The warning assistance can differ depending
on the equipment and may vary according to
the setting.
The exit warning is only available when Active
Blind Spot Assist is activated and up to a maxi-
mum of three minutes after the ignition has been
switched off. The exit warning is no longer availa-
ble once the warning lamp in the outside mirror
flashes three times.
The exit warning is only an aid and not a substi-
tute for the attention of vehicle occupants. The
responsibility for opening and closing the doors
and for leaving the vehicle remains with the vehi-
cle occupants.
System limits
Active Blind Spot Assist may be limited in the fol-
lowing situations, in particular:
if there is dirt on the sensors or the sensors
R
are obscured
in poor visibility, e.g. due to fog, heavy rain or
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snow
of the
if there are narrow vehicles, e.g. bicycles or
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motorbikes
if the road has very wide or narrow lanes
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if vehicles are not driving in the middle of their
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lane
Warnings may be issued in error when driving
close to crash barriers or similar continuous lane
borders. Always make sure that there is sufficient
distance to the side for other traffic or obstacles.
P223 0288 02
Warnings may be interrupted when driving along-
side long vehicles, for example lorries, for a pro-
longed time.
Active Blind Spot Assist is not operational when
reverse gear is engaged.
Active Blind Spot Assist is not operational if trans-
port equipment, for example a trailer or bicycle
rack, is attached to the trailer hitch and the elec-
trical connection has been correctly established.
Additionally, the exit warning may be limited in the
following situations:
when the sensors are covered by adjacent
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vehicles in narrow parking spaces
when people approach the vehicle
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in the event of stationary or slowly moving
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objects
▌Function of the brake application of Active
Blind Spot Assist
If Active Blind Spot Assist detects a risk of a side
impact in the monitoring range, a course-correct-
ing brake application is carried out. This is
designed to help you avoid a collision.