R
the lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow
R
the distance to the vehicle in front is too small
and the lane markings thus cannot be detec-
ted
R
the lane markings change quickly, e.g. lanes
branch off, cross one another or merge
R
the road is narrow and winding
R
there are highly variable shade conditions on
the road
Activating Lane Keeping Assist
X
Activate Lane Keeping Assist using the on-
board computer; to do so, select
Standard
Standard
or
Adaptive
Adaptive
(
Y
page 291).
If you drive at speeds above 60 km/h and lane
markings are detected, the lines in the assis-
tance graphic display (
Y
page 290) are
shown in green. Lane Keeping Assist is ready
for use.
Standard
If
Standard
Standard
is selected, no warning vibration
occurs if:
R
you have switched on the turn signals. In this
case, the warnings are suppressed for a cer-
tain period of time.
R
a driving safety system intervenes, such as
ABS, BAS or ESP
®
.
Adaptive
When
Adaptive
Adaptive
is selected, no warning vibra-
tion occurs if:
R
you have switched on the turn signals. In this
case, the warnings are suppressed for a cer-
tain period of time.
R
a driving safety system intervenes, such as
ABS, BAS or ESP
®
.
R
you accelerate hard, e.g. kickdown.
R
you brake hard.
R
you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R
you cut the corner on a sharp bend.
In order that you are warned only when neces-
sary and in good time if you cross the lane mark-
ing, the system detects certain conditions and
warns you accordingly.
The warning vibration occurs earlier if:
R
you approach the outer lane marking on a
bend
R
the road has very wide lanes, e.g. a motorway
R
the system detects solid lane markings
The warning vibration occurs later if:
R
the road has narrow lanes
R
you cut the corner on a bend
Active Driving Assistance package
General notes
The Active Driving Assistance package consists
of DISTRONIC PLUS (
Y
page 207), Active Blind
Spot Assist (
Y
page 247) and Active Lane Keep-
ing Assist (
Y
page 250).
Active Blind Spot Assist
General notes
Active Blind Spot Assist monitors the areas on
either side of the vehicle that are not directly
visible to the driver with two lateral, rear-facing
radar sensors. A warning lamp lights up in the
exterior mirrors and draws your attention to
vehicles detected in the monitored area. If you
then switch on the corresponding turn signal to
change lanes, you will also receive a visual and
audible collision warning. If a risk of side impact
is detected, corrective braking may help you
avoid a collision. Active Blind Spot Assist eval-
uates the free space in the direction of travel
and to the side before making a course-correct-
ing brake application. For this, Active Blind Spot
Assist uses the forward-facing radar sensors.
Active Blind Spot Assist supports you from a
speed of approximately 30 km/h.
Important safety notes
Active Blind Spot Assist is only an aid and is not
a substitute for attentive driving.
G
WARNING
Active Blind Spot Assist does not react to
vehicles:
R
overtaking too closely on the side, placing
them in the blind spot area
R
if the difference in the speed of approach
and overtaking is too great
Driving systems
247
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ivi
ng
an
d
parki
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