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R
the distance to the vehicle in front is too short
and thus the lane markings 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 roadway
The system is switched to passive and no longer
assists you by performing steering interventions
if:
R
you actively change lane
R
you switch on the turn signal
R
you take your hands off the steering wheel or
do not steer for a prolonged period of time
i
Once you have finished changing lanes,
Active Steering Assist automatically reacti-
vates.
Active Steering Assist cannot provide assis-
tance:
R
on very sharp corners
R
when towing a trailer
R
when a loss of tire pressure or a defective tire
has been detected and displayed
Observe the important safety notes on Active
Distance Assist DISTRONIC (Y page 173).
The steering interventions are carried out with a
limited steering moment. The system requires
the driver to keep his hands on the steering
wheel and to steer himself.
If you do not steer yourself or if you take your
hands off the steering wheel for a prolonged
period of time, the system will first alert you with
a visual warning. A steering wheel symbol
appears in the multifunction display. If you have
still not started to steer and have not taken hold
of the steering wheel after five seconds at the
latest, a warning tone also sounds to remind you
to take control of the vehicle. Active Steering
Assist is then switched to passive. Active Dis-
tance Assist DISTRONIC remains active.
Activating Active Steering Assist
X
Select the Active Distance Assist DISTRONIC
with Active Steering Assist function using the
on-board computer (Y page 238).
The ActiveActive SteeringSteering AssistAssist OnOn message
appears on the multifunction display. Active
Steering Assist is activated.
Information in the multifunction display
If Active Steering Assist is activated but not
ready for a steering intervention, steering wheel
symbol : appears in gray. If the system pro-
vides you with support by means of steering
interventions, symbol : is shown in green.
Deactivating Active Steering Assist
X
Deactivate the Active Distance Assist
DISTRONIC with Active Steering Assist func-
tion using the on-board computer
(Y page 238).
The Active Steering Assist OffActive Steering Assist Off mes-
sage appears on the multifunction display.
Active Steering Assist is deactivated.
When Active Distance Assist DISTRONIC is
deactivated or not available, Active Steering
Assist is deactivated automatically.
Level control (vehicles with the Off-
Road Engineering package)
Important safety notes
Level control adapts the vehicle level automati-
cally to the current operating and driving situa-
tion. This results in reduced fuel consumption
and improved handling.
Make changes to the vehicle level while the
vehicle is in motion. This enables the vehicle to
adjust to the new level as quickly as possible.
The vehicle level may change visibly if you park
the vehicle and the outside temperature
changes. If the temperature drops, the vehicle
level is lower; with an increase in temperature,
the vehicle level rises.
If you unlock the vehicle or open a door, the
vehicle begins to compensate for load discrep-
ancies while still parked. However, for signifi-
cant level changes, such as after the vehicle has
been stationary for a long period, the engine
must be on. For safety reasons, the vehicle is
only lowered when the doors are closed. Low-
180
Driving systems
Driving and parking
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