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Driving systems
254
increasing lapses in concentration on the part
of the driver, it suggests taking a break.
Important safety notes
ATTENTION ASSIST is only an aid. It may not
always detect fatigue or lapses in concentra-
tion until too late, or may not detect them at
all. The system is not a substitute for a well-
rested and attentive driver.
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
R
approximately 30 minutes
if the road condition is poor, e.g. if the sur-
R
face is uneven or if there are potholes
if there is a strong side wind
R
if you have adopted a sporty driving style
R
with high cornering speeds or high rates of
acceleration
if you are predominantly driving at a speed
R
below 60 km/h or above 200 km/h
if you are driving with the DISTRONIC PLUS
R
active steer assist activated
if the time has been set incorrectly
R
in active driving situations, such as when
R
you change lanes or change your speed
ATTENTION ASSIST is reset and starts
assessing your tiredness again when you con-
tinue your journey if:
you switch off the engine
R
you take off your seat belt and open the
R
driver's door, e.g. for a change of drivers or
to take a break
Displaying the attention level
You can have current status information dis-
played in the assistance menu (
of the on-board computer.
Select the assistance graphics display for
X
ATTENTION ASSIST using the on-board
computer (
page 286).
Y
The following information is displayed:
the length of the journey since the last
R
break
the attention level determined by ATTEN-
R
TION ASSIST, displayed in a bar display in
five levels from high to low
if ATTENTION ASSIST is unable to calculate
R
the attention level and cannot output a
warning, the
System suspended
System suspended
appears. The bar display then changes the
display, e.g. if you are driving at a speed
below 60 km/h or above 200 km/h.
Activating ATTENTION ASSIST
Activate ATTENTION ASSIST using the on-
X
board computer (
Y
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 deactivated, the
À symbol and OFF appear in the multi-
function display in the assistance graphics
display when the engine is running.
When ATTENTION ASSIST has been deactiva-
ted, it is automatically reactivated after the
engine has been switched off. The sensitivity
selected corresponds to the last selection
activated (standard/sensitive).
page 286)
Y
message
page 288).
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