Mercedes-Benz A-Class Operator's Manual page 195

Blind Spot Assist and Active Blind Spot
Assist
Function of Blind Spot Assist and Active
Blind Spot Assist with exit warning
Blind Spot Assist and Active Blind Spot Assist
use two lateral, rear-facing radar sensors to
monitor the area up to 130 ft (40 m) behind your
vehicle and 10 ft (3 m) directly next to your vehi‐
cle.
If a vehicle is detected at speeds above approx‐
imately 8 mph (12 km/h) and this vehicle subse‐
quently enters the monitoring range directly next
to your vehicle, the warning lamp in the outside
mirror lights up red.
If a vehicle is detected close to your vehicle in
the lateral monitoring range and you switch on
the turn signal indicator in the corresponding
direction, a warning tone sounds once. The red
warning lamp in the outside mirror flashes. If the
turn signal indicator remains switched on, all
other detected vehicles are indicated only by the
flashing of the red warning lamp.
If you overtake a vehicle quickly, no warning is
given.
& WARNING Risk of accident despite Blind
Spot Assist
Blind Spot Assist does not react to vehicles
approaching and overtaking you at a greatly
different speed.
As a result, Blind Spot Assist cannot warn
drivers in this situation.
Always pay careful attention to the traf‐
#
fic situation and maintain a safe dis‐
tance at the side of the vehicle.
Blind Spot Assist and Active Blind Spot Assist
are only aids. They may fail to detect some vehi‐
cles and are no substitute for attentive driving.
Always ensure that there is sufficient distance to
the side for other road users and obstacles.
Exit warning
The exit warning is an additional function of
Blind Spot Assist and can warn vehicle occu‐
pants about approaching vehicles when leaving
the vehicle when stationary.
If there is a vehicle in the monitoring range, this
is indicated in the outside mirror. If a vehicle
Driving and parking 193
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:
the sensors are dirty or covered
R
visibility is poor, e.g. due to fog, heavy rain,
R
snow or spray
narrow vehicles, e.g. bicycles, are within the
R
monitoring range