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ATTENTION ASSIST assesses your level of fati-
gue or lapses in concentration by taking the
following criteria into account:
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your personal driving style, e.g. steering
characteristics
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journey details, e.g. time of day and length
of journey
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all:
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if the road condition is poor, e.g. if the sur-
face is uneven or if there are potholes
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if there is a strong side wind
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if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
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if you are predominantly driving slower than
50 mph (80 km/h) or faster than 112 mph
(180 km/h)
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if you are currently using COMAND or mak-
ing a telephone call with it
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if the time has been set incorrectly
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in active driving situations, such as when
you change lanes or change your speed
ATTENTION ASSIST is only an aid to the driver.
It might not always recognize fatigue or
increasing inattentiveness in time or fail to
recognize them at all. The system is not a sub-
stitute for a well-rested and attentive driver.
Warning and display messages in the
multifunction display
X
Activate ATTENTION ASSIST using the on-
board computer (Y page 175).
If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after
your journey has begun. You then hear an
intermittent warning tone twice and the
ATTENTION ASSIST: Take a Break!ATTENTION ASSIST: Take a Break! mes-
sage appears in the multifunction display.
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If necessary, take a break.
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Press the a or % button to confirm
the message.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break and ATTENTION ASSIST
still detects increasing lapses in concentra-
tion, you will be warned again after 15 minutes
at the earliest.
ATTENTION ASSIST is reset when you continue
your journey and starts assessing your tired-
ness again if:
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you switch off the engine
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you take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break
When ATTENTION ASSIST is deactivated, the
é symbol appears in the multifunction dis-
play in the assistance graphics display.
Vehicles with COMAND: if a warning is out-
put in the multifunction display, a service sta-
tion search is performed in the multimedia
system. You can select a service station and
navigation to this service station will then
begin. This function can be activated and
deactivated in the multimedia system.
Lane Tracking package
General notes
The Lane Tracking package consists of Blind
Spot Assist (Y page 163) and Lane Keeping
Assist (Y page 165).
Blind Spot Assist
General notes
Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sen-
sors. A warning display in the exterior mirrors
draws your attention to vehicles detected in
the monitored area. If you then switch on the
corresponding turn signal to change lane, you
will also receive an optical and audible warn-
ing.
Blind Spot Assist supports you from a speed of
approximately 20 mph (30 km/h).
For Blind Spot Assist to assist you, the radar
sensor system must be operational.
Driving systems
163
Driving and parking
Z
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