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The driven speed is adjusted when the vehicle is
level with the traffic sign at the latest. In the
case of signs indicating entry into an urban area,
the speed is adapted according to the speed
permitted within the urban area. The speed limit
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 motorway), the recom‐
mended speed is adopted as the stored speed.
The system uses the speed stored on an unlimi‐
ted stretch of road as the recommended speed.
If you do not alter the stored speed on an unlimi‐
ted stretch of road, the recommended speed is
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 limitations
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 for 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:
In the wet or in fog
R
When towing a trailer
R
Ensure that the driven speed complies
#
with traffic regulations.
Adjust the driving speed to suit current
#
traffic and weather conditions.
Driving and parking 205
Function of route-based speed adaptation
%
The following function is country-dependent
and only available in conjunction with the
Driving Assistance Package.
When Distance Assist DISTRONIC is active, the
function adjusts the speed depending on the
route events ahead. Depending on the drive pro‐
gram selected, the vehicle negotiates the 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 adjustment can by config‐
ured in the multimedia system (
Route events ahead are:
Bends
R
T-junctions, roundabouts and toll stations
R
Turns and exits
R
Traffic jams ahead (only with Live Traffic
R
(
page 300))
→
page 206).
→
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