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display in the Instrument Display is always upda‐
ted when the vehicle is level with the traffic sign.
If there is no speed restriction on an unlimited
stretch of road (e.g. on a freeway), the recom‐
mended speed is automatically adopted as the
stored speed. The system uses the speed stored
on an unlimited stretch of road as the recom‐
mended speed. If you do not alter the stored
speed on an unlimited stretch of road, the rec‐
ommended speed is 80 mph (130 km/h).
If Active Distance Assist DISTRONIC has been
put into passive mode by pressing the accelera‐
tor pedal, only speed limits which are higher
than the set speed are adopted.
Active Speed Limit Assist is only an aid. The
driver is responsible for keeping a safe distance
to the vehicle in front, for vehicle speed and for
braking in good time. The maximum permissible
speed also depends on factors such as the road
surface and traffic conditions.
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
%
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 216).
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 385))
%
When the toll station is reached, Active Dis‐
tance Assist DISTRONIC adopts the speed as
the stored speed.
Driving and parking
215
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