Mercedes-Benz V-Class Operating Instructions Manual page 222

Driving systems
220
The functionality of ATTENTION ASSIST is
restricted, and warnings may be delayed or not
occur at all:
if the length of the journey is less than approx-
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imately 30 minutes
if the road condition is poor, e.g. if the surface
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is uneven or if there are potholes
if there is a strong side wind
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if you have adopted a sporty driving style with
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high cornering speeds or high rates of accel-
eration
if you are predominantly driving at a speed
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below 60 km/h or above 200 km/h
if the time has been set incorrectly
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in active driving situations, such as when you
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change lanes or change your speed
ATTENTION ASSIST is reset and starts assessing
your attention again when you continue your
journey if:
you switch off the engine
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you take off your seat belt and open the driv-
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er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level
You can have the current ATTENTION ASSIST
assessment displayed using the
graphic
menu in the on-board computer.
X
Call up the current ATTENTION ASSIST
assessment using the
Y
menu ( page 255).
The following information is displayed:
the length of the journey since the last break
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the attention level determined by ATTENTION
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ASSIST, displayed in a bar display in five levels
from low to high
if ATTENTION ASSIST is unable to calculate
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the attention level and cannot output a warn-
Assistance
Assistance graphic
System suspended
ing, the
appears in the display. The bar display is then
dimmed. This is the case, for example, if you
are driving at a speed below 60 km/h or
above 200 km/h
Activating ATTENTION ASSIST
X
Activate ATTENTION ASSIST using the on-
Y
board computer (
The system determines the attention level of
the driver depending on the setting selected:
Standard selected: the sensitivity with
which the system determines the attention
level is set to normal.
Sensitive selected: the sensitivity is set
higher. The attention level detected by
ATTENTION ASSIST is adapted accordingly
and the driver is warned earlier.
When ATTENTION ASSIST is switched off and
the engine is running the assistance graphics
show the À symbol and OFF.
If you deactivate ATTENTION ASSIST, the sys-
tem is automatically re-activated when you start
the engine. The system sensitivity then corre-
sponds to the last selection activated – standard
or sensitive.
Warning in the display
If the system detects tiredness or increasing
lapses in concentration, the warning
tion Assist: Take a break!
display in addition to the length of the journey
since the last break.
A warning tone also sounds.
X
If necessary, take a break.
X
Confirm the message by pressing the a
button on the steering wheel.
On long journeys, take regular breaks in good
time to allow yourself to rest. If you do not take
a break and ATTENTION ASSIST continues to
detect increasing lapses in concentration, you
will be warned again after 15 minutes at the
earliest. This will only happen if ATTEN-
TION ASSIST still detects typical indicators of
fatigue or increasing lapses in concentration.
If the warning is shown in the display, the mul-
timedia system offers to perform a service sta-
tion search. You can select a service station and
navigation to this service station will then begin.
This function can be activated and deactivated
message
page 258).
Atten‐
is shown in the