Mercedes-Benz Metris Operating Instructions Manual page 157

Assist is ready for use, the lane markings in
the symbol are shown as solid lines ;.
Setting the sensitivity of Lane Keeping
Assist
X
Assist.
In the menu on the on-board com-
puter, select the Lane Keeping Assist:
Y
function ( page 191).
X
Standard or Adaptive.
Select
Standard
In the setting, no warning vibration
occurs if:
you operate the turn signal in the corre-
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sponding direction. In this event, the warn-
ings are suppressed for a certain period of
time.
a driving safety system, such as ABS, BAS or
R
®
ESP , intervenes or performs a control
action.
Adaptive
When is selected, there is also no
warning vibration when:
you accelerate hard, e.g. kickdown.
R
brake sharply.
R
you steer actively, e.g. swerve to avoid an
R
obstacle or change lanes quickly.
you cut the corner on a sharp bend.
R
In order that you are warned only when neces-
sary and in good time if you cross the lane
marking, the system differentiates between
various conditions and warns you accordingly.
The warning vibration occurs earlier if:
you approach the outer lane marking on a
R
bend.
the road has very wide lanes, such as a
R
highway.
the system detects solid lane markings.
R
The warning vibration occurs later if:
the road has narrow lanes.
R
you cut the corner on a bend.
R
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
Driving systems
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
concentration until too late, or may not detect
them at all. ATTENTION ASSIST is not a substi-
tute 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 40 mph (60 km/h) or above 125 mph
(200 km/h)
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 assess-
ing your attention again when you continue
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
155
Z