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Active Distance Assist DISTRONIC must be
active in order for the function to be available.
Important safety notes
Active Distance Assist DISTRONIC with Active
Steering Assist can neither reduce the risk of an
accident if you fail to adapt your driving style,
nor override the laws of physics. It cannot take
into account road, weather or traffic conditions.
Active Distance Assist DISTRONIC with Active
Steering Assist is only an aid. You are responsi-
ble for the distance to the vehicle in front, for
vehicle speed, for braking in good time and for
staying in your lane.
Active Distance Assist DISTRONIC with Active
Steering Assist does not detect road and traffic
conditions and does not detect all road users. If
you are following a vehicle which is driving
towards the edge of the road, your vehicle could
come into contact with the curb or other road
boundaries. Be particularly aware of other road
users, e.g. cyclists, that are directly next to your
vehicle.
Obstacles such as traffic pylons on the lane or
projecting out into the lane are not detected.
An inappropriate steering intervention, e.g. after
intentionally driving over a lane marking, can be
corrected at any time if you steer slightly in the
opposite direction.
Active Distance Assist DISTRONIC with Active
Steering Assist cannot continuously keep your
vehicle in lane. In some cases, the steering
intervention is not sufficient to bring the vehicle
back to the lane. In such cases, you must steer
the vehicle yourself to ensure that it does not
leave the lane.
The support provided by the system can be
impaired if:
R
there is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or heavy spray
R
there is glare, e.g. from oncoming traffic, the
sun or reflection from other vehicles (e.g. if
the road surface is wet)
R
the windshield is dirty, fogged up, damaged or
covered, for instance by a sticker, in the vicin-
ity of the camera
R
there are no or several unclear lane markings
for one lane, e.g. roadworks
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 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 172).
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 237).
The ActiveActive SteeringSteering AssistAssist OnOn message
appears on the multifunction display. Active
Steering Assist is activated.
178
Driving systems
Driving and parking
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