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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
Once you have finished changing lanes, Active
Steering Assist automatically reactivates.
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 162).
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
Press button ;.
Indicator lamp : lights up. The ActiveActive
Steering Assist OnSteering Assist On 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
Press button ;.
Indicator lamp : goes out. The Active
Active
SteeringSteering AssistAssist OffOff message 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.
Driving systems
169
Driving and parking
Z
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