Mercedes-Benz B-Class 2011 Owner's Manual page 179

Driving systems
176
detected message appears in the multi-
function display.
If necessary, take a break.
X
Press the a button to confirm the mes-
X
sage.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break, you will be warned again
after 15 minutes at the earliest. The precon-
dition for this is that ATTENTION ASSIST still
detects typical indicators of fatigue or
increasing lapses in concentration.
ATTENTION ASSIST is reset and starts
assessing your tiredness again when you con-
tinue your journey if:
you switch off the engine.
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you take off your seat belt and open the
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driver's door, e.g. for a change of drivers or
to take a break.
Speed Limit Assist
General notes
Speed Limit Assist shows you detected speed
limits in the multifunction display. Data from
the navigation system is also used for this
purpose. If a traffic sign indicating a speed
limit or the end of a speed limit is detected,
it is shown in the multifunction display. If
Speed Limit Assist does not detect any traffic
signs, the speed limit from the digital road
map is taken and shown in the display.
Speed Limit Assist detects the traffic signs
with a camera attached behind the top of the
windscreen.
Speed Limit Assist camera
:
Important safety notes
G
WARNING
Speed Limit Assist is only an aid and may
detect speed limit signs incorrectly or not at
all.
The system may be impaired or may not func-
tion if:
there is poor visibility, e.g. due to snow,
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rain, fog or spray.
there is glare, e.g. from the sun or from
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oncoming traffic.
the windscreen is dirty, misted up or cov-
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ered, for instance by a sticker, in the vicinity
of the camera.
the traffic signs are covered, for instance
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by dirt, snow or trees.
the traffic signs are poorly illuminated.
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there are ambiguous traffic signs, for
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instance near roadworks or on multi-lane
roads.
Traffic signs always have priority over the
Speed Limit Assist display. Speed Limit Assist
cannot detect road and traffic conditions. It is
not a substitute for attentive driving.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others.