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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 recommen-
ded speed. If you do not alter the stored speed on
an unlimited stretch of road, the recommended
speed is 80 mph (130 km/h).
If Active Distance Assist DISTRONIC has been put
into passive mode by pressing the accelerator
pedal, only speed limits that are higher than the
set speed are adopted.
Observe the notes on driving systems and your
responsibility; you may otherwise fail to recognize
dangers (
page 155).
/
System limits
Syst
em limits
The system limits of Tra c Sign Assist apply to
the detection of tra c signs (
page 180).
/
Speed limits below 12 mph (20 km/h) are not
automatically adopted by the system as the stored
speed. Temporary speed restrictions (e.g. for a
certain time or due to weather conditions) cannot
be properly detected by the system. The maxi-
mum permissible speed applying to a vehicle with
a trailer is not detected by the system.
Adjust the speed in these situations.
& W W ARNING
ARNING 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:
at speed limits below 12 mph (20 km/h)
R
in wet conditions or in fog
R
when towing a trailer
R
Ensure that the driven speed complies
#
with tra c regulations.
Adjust the driving speed to suit current
#
tra c and weather conditions.
F F unction of r
unction of rout
oute-based speed adapt
e-based speed adaptation
When Active Distance Assist DISTRONIC is activa-
ted, the vehicle speed will be adapted accordingly
to the route events ahead. Depending on the drive
program selected, the vehicle negotiates a route
event ahead in an economical, comfortable 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 restric-
tions ahead are taken into account.
You can activate and deactivate route-based
speed adaptation in the multimedia system
(
page 170).
/
The following route events are taken into account:
Bends
R
T-intersections, tra c circles and toll stations
R
Turns and exits
R
Tra c jams ahead (only with Live Tra c Infor-
R
mation (
page 263))
/
%
When the toll station is reached, Active Dis-
tance Assist DISTRONIC adopts the speed as
the stored speed.
ation
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:
Turning at intersections
R
Driving and parking 169
169
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