Mercedes-Benz C-Class Coupe 2019 Operator's Manual page 209

& WARNING Risk of accident despite exit
warning
The exit warning reacts neither to stationary
objects nor to vehicles approaching you at a
greatly different speed.
As a result, the exit warning cannot warn
drivers in these situations.
Always pay particular attention to the
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traffic situation when opening the doors
and make sure there is sufficient clear‐
ance.
If there is a vehicle in the monitoring range, this
is indicated in the outside mirror. If a vehicle
occupant opens the door on the side with the
warning, a warning tone sounds and the warning
lamp in the outside mirror starts to flash.
This additional function is only available when
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
available 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 limitations
Blind Spot Assist and Active Blind Spot Assist
may be limited in the following situations:
if there is dirt on the sensors or the sensors
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are obscured
in poor visibility, e.g. due to fog, heavy rain or
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snow
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
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their lane
Warnings may be issued in error when driving
close to crash barriers or similar solid lane bor‐
ders. Always make sure that there is sufficient
distance to the side for other traffic or obsta‐
cles.
Driving and parking 207
Warnings may be interrupted when driving along‐
side long vehicles, for example trucks, for a pro‐
longed time.
Blind Spot Assist is not operational when reverse
gear is engaged.
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 brake application (Active Blind
Spot Assist)
The brake application function is only available
for vehicles with a Driving Assistance Package.
If Active Blind Spot Assist detects a risk of a side
impact in the monitoring range, a course-cor‐
recting brake application is carried out. This is
designed to help you avoid a collision.
The course-correcting brake application is availa‐
ble in the speed range between approximately
20 mph (30 km/h) and 125 mph (200 km/h).