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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 198).
The following route events are taken into
account:
R
Bends
R
T-intersections, traffic circles and toll sta‐
tions
R
Turns and exits
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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.
Speed adjustment is canceled in the following
cases:
R
If the turn signal indicator is switched off
before the route event.
R
If the driver depresses the accelerator or
brake pedal during the process.
System limits
Route-based speed adaptation does not take
right of way regulations into account. The driver
is responsible for complying with road traffic
regulations and driving at a suitable speed.
In difficult conditions (e.g. unclear roads, lane
narrowing, wet road surfaces, snow or ice) or
when driving with a trailer, the speed adjustment
made by the system may not always be suitable.
In these situations the driver must intervene
accordingly.
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WARNING Risk of accident in spite of
route-based speed adjustment
Route-based speed adjustment might mal‐
function or be temporarily unavailable in the
following situations:
Driving and parking
197
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