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System limits
Temporary speed restrictions (e.g. for a certain
time or due to weather conditions) cannot be
properly detected by the system. The maximum
permissible speed applying to a vehicle with a
trailer is not detected by the system. In these sit‐
uations you must adjust your speed yourself.
&
WARNING Risk of accident due to Active
Speed Limit Assist adapting the vehicle's
speed
The speed adopted by Active Speed Limit
Assist may be too high or incorrect in some
individual cases, such as:
R
In the wet or in fog
R
When towing a trailer
#
Ensure that the driven speed complies
with traffic regulations.
#
Adjust the driving speed to suit current
traffic and weather conditions.
Function of route-based speed adaptation
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The following function is country-dependent
and only available in conjunction with the
Driving Assistance Package.
When Active Distance Assist DISTRONIC is acti‐
vated, the vehicle speed will be adjusted accord‐
ingly to the route events ahead. Depending on
the drive program selected, the vehicle negoti‐
ates a route event ahead in a fuel-saving, com‐
fortable or dynamic manner. When the route
event has been passed, the vehicle accelerates
again to the stored speed. The set distance to
the vehicle in front, vehicles detected ahead and
speed restrictions ahead are taken into account.
Route-based speed adjustment can be config‐
ured in the multimedia system (/ page 180).
The following route events are taken into
account:
R
Bends
R
T-intersections, traffic circles and toll sta‐
tions
R
Turns and exits
R
Traffic jams ahead (only with Live Traffic
(/ page 288))
%
When the toll station is reached, Active Dis‐
tance Assist DISTRONIC adopts the speed as
the stored speed.
Also, the speed is reduced if the turn signal indi‐
cator to change lanes is switched on and one of
the following situations is detected:
R
Turning off at intersections
R
Driving on slowing-down lanes
R
Driving on lanes adjacent to slowing-down
lanes
The driver is responsible for choosing the right
speed and observing other road users. This
applies in particular to intersections, traffic cir‐
cles and traffic lights, as route-based speed
adaptation does not brake the vehicle to a stand‐
still.
When route guidance is active, the first speed
adjustment is carried out automatically. If the
turn signal indicator is switched on, the selected
route is confirmed and further speed adjustment
is activated.
Driving and parking
179
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