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the lines on the assistance graphic display are
shown in green (Y page 219). Active Lane
Keeping Assist is ready for use.
X
To deactivate: press button ;.
Indicator lamp : goes out. The Active Lane
Keeping Assist is deactivated. The LaneLane
Keeping Assist OffKeeping Assist Off message appears in
the multifunction display.
Selecting Standard or Adaptive setting
X
In the DriveAssistDriveAssist menu on the on-board
computer, select the Active Lane Keep‐Active Lane Keep‐
ing Assisting Assist function (Y page 221).
X
Select setting StandardStandard or AdaptiveAdaptive.
When StandardStandard is selected, no warning vibra-
tion occurs if:
R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R
a driving safety system intervenes, such as
ABS, BAS or ESP
®
.
When Adaptive
Adaptive is selected, no warning vibra-
tion occurs if:
R
you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R
a driving safety system intervenes, e.g.
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 lanes quickly.
R
you cut the corner on a sharp bend.
To ensure that you are warned only when nec-
essary and in good time if you cross the lane
markings, 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 freeway
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
Towing a trailer
When you attach a trailer, make sure you have
correctly established the electrical connection.
This can be accomplished by checking the trailer
lighting.
Towing a trailer
Important safety notes
G
WARNING
Installing an unsuitable ball coupling may
result in overloading of the trailer tow hitch
and the rear axle. This applies especially if the
ball coupling in question is longer or angled
differently. This could seriously impair the
driving characteristics and the trailer can
come loose. There is a risk of an accident.
You should only ever install a ball coupling
that has the permissible dimensions and that
is designed to meet your trailer-towing
requirements. Do not modify the ball coupling
or the trailer tow hitch.
You will find the values approved by the manu-
facturer on the vehicle identification plates and
those for the towing vehicle under "Technical
data" (Y page 364).
G
WARNING
When the vehicle/trailer combination begins
to lurch, you could lose control of it. The vehi-
cle/trailer combination could even rollover.
There is a risk of an accident.
On no account should you attempt to
straighten up the vehicle/trailer combination
by increasing the speed. Reduce vehicle
speed and do not countersteer. Apply the
brake as necessary.
!
If you have a trailer tow hitch retrofitted,
changes to the engine cooling system may be
necessary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chassis
frame.
The installation of a trailer tow hitch is only per-
missible if a towing weight is specified in your
vehicle documents. If this is not the case, then
the vehicle is not approved for the towing of a
trailer.
202
Towing a trailer
Driving and parking
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