Attention Assist - Mercedes-Benz 2016 Metris Operator's Manual

Driving systems
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ing, the system recognizes certain conditions
and warns you accordingly.
The warning vibration occurs earlier if:
you approach the outer lane marking on a
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bend.
the road has very wide lanes, e.g. a freeway.
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the system recognizes solid lane markings.
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The warning vibration occurs later if:
the road has narrow lanes.
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you cut the corner on a bend.
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Alertness Assistant ATTENTION
ASSIST
General notes
ATTENTION ASSIST helps you during long,
monotonous journeys such as on freeways and
interstate highways. It is active in the 40 mph
(60 km/h) to 125 mph (200 km/h) range. If
ATTENTION ASSIST detects typical indicators of
fatigue or increasing lapses in concentration on
the part of the driver, it suggests taking a break.
Important safety notes
ATTENTION ASSIST is only an aid. The system
may not always detect fatigue or lapses in con-
centration until too late, or may not detect them
at all. ATTENTION ASSIST 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 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 40 mph (60 km/h) or above 125 mph
(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
For vehicles with steering wheel buttons you can
have the current ATTENTION ASSIST (Attention
Level) assessment displayed.
Select Status Overview Status Overview
X
menu and display the attention level
( page 184).
Y
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-
ing, the System System Passive Passive
the display. The bar display is then dimmed.
This is the case, for example, if you are pre-
dominantly driving at a speed below 40 mph
(60 km/h) or above 125 mph (200 km/h).
Activating ATTENTION ASSIST
Activating ATTENTION ASSIST with the on-
X
board computer:
on vehicles without steering wheel buttons
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( page 175)
Y
on vehicles with steering wheel buttons
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( page 185)
Y
For vehicles with steering wheel buttons, the
system determines the attention level of the
driver depending on the setting selected:
in the Assist. Assist.
message appears in