Mercedes-Benz B-Class Electric Drive 2014 Operator's Manual page 170

Driving systems
168
Important safety notes
G WARNING
Blind Spot Assist does not react to:
vehicles overtaken too closely on the side,
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placing them in the blind spot area
vehicles which approach with a large speed
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differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving.
i
USA only:
This device has been approved by the FCC
as a "Vehicular Radar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired if:
there is dirt on the sensors or anything else
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covering the sensors
there is poor visibility, e.g. due to fog, heavy
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rain or snow
a narrow vehicle traveling in front, e.g. a
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motorbike or bicycle
the road has very wide lanes
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the road has narrow lanes
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you are not driving in the middle of the lane
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there are barriers or similar lane borders
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Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors the area up to 10 ft
(3.0 m) behind your vehicle and directly next
to your vehicle, as shown in the diagram. For
this purpose, Blind Spot Assist uses radar
sensors in the rear bumper.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may be
the case as soon as the vehicles are driving on
the inner side of their lane.
Due to the nature of the system:
warnings may be issued in error when driv-
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ing close to crash barriers or similar solid
lane borders.
warnings may be interrupted when driving
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alongside particularly long vehicles, e.g.
trucks, for a prolonged time.
The two sensors for Blind Spot Assist are
integrated into the sides of the rear bumper.
Make sure that the bumper is free of dirt, ice
or slush in the vicinity of the sensors. For
example, the radar sensors must not be cov-
ered by bicycle racks or overhanging loads.
Following a severe impact or in the event of
damage to the bumpers, have the function of
the radar sensors checked at a qualified spe-