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208 Driving and parking
208
System limits
Syst
em limits
The system limits of Tra c Sign Assist apply to
the detection of tra c signs (
/
Speed limits below 20 km/h are not automatically
adopted by the system as the stored speed. Tem-
porary speed restrictions (e.g. for a certain time
or due to weather conditions) cannot be properly
detected by the system. The maximum permissi-
ble 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 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.
page 221).
Adjust the driving speed to suit current
#
tra c and weather conditions.
F F unction of r
unction of rout
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 a fuel-saving, 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.
Route-based speed adaptation can be activated in
the multimedia system (
The following route events are taken into account:
Bends
R
Roundabouts
R
T-junctions
R
Turns and exits
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oute-based speed adapt
e-based speed adaptation
ation
page 209).
/
Tra c jams ahead (only with Live Tra c )
R
Also, the speed is reduced if the turn signal indi-
cator is switched on and one of the following sit-
uations is detected:
Turning o at junctions
R
Driving on slowing-down lanes
R
Driving on lanes adjacent to slowing-down
R
lanes
The driver is responsible for choosing the right
speed and observing other road users. This
applies in particular to junctions, roundabouts and
tra c lights, as route-based speed adaptation
does not brake the vehicle to a standstill.
If a corresponding route event is detected while
route guidance is active, the rst speed adjust-
ment is carried out automatically. If the turn signal
indicator is switched on, the selected route is
con rmed and further speed adjustment is activa-
ted.
Speed adaptation is cancelled in the following
cases:
If the turn signal indicator is switched o
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before the route event and it is therefore
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