Speed Limit Assist - Mercedes-Benz Series 218 Coupe Introduction Into Service Manual

The Speed Limit Assist function, which is available as
special equipment with (code 513), uses the multi-
function camera to record the speed limit for the
section of road the vehicle is driving on as indicated by
the road signs. The multifunction camera also records
supplementary signs and derestriction signs. In addi-
tion, the verified attributes in the digital map of the
navigation system are also evaluated.
On the CLS-Class, the corresponding road signs are
shown for the first time in color on the multifunction
display and Audio/COMAND display.
Speed Limit Assist is permanently active in the back-
ground.
It is operated via the menu "Speed Limit" on the instru-
ment cluster.
National legislation governing the design and installa-
tion of traffic signs is taken into account by the
system. The image recognition module assigns
degrees of probability to all the results and forwards
these on to the integrated software modules.
Display on multifunction display (shown for ECE)
1 Speed Limit Assist is available and notification mode is
activated
2 Detected speed limit
3 Unit for the displayed road sign
– This printout will not be recorded by the update service. Status: 09 / 2010 –
Image recognition
The decision module processes the following relevant
data:
• The vehicle's surroundings registered by the
multifunction camera
• Speed and yaw rate
• Attributes of the navigation system from the digital
road map (e.g. type of road)
When the data has been evaluated, the multifunction
camera sends a corresponding request to control the
display of the currently detected speed limit to the
instrument cluster.
The multifunction camera even combines the speed
limit information into a result if the information is
contradictory.
If one of the data sources (image recognition, vehicle
data or navigation data) fails, Speed Limit Assist is
temporarily unavailable. The function is deactivated if
a control unit fails.
Display concept
The display concept can be selected via the instru-
ment cluster. A distinction is made between notifica-
tion mode and permanent display:
Notification mode
In notification mode the detected speed limit is
displayed in the form of a road sign for 5 s. The notifi-
cation can be canceled within the display time. Notifi-
cation mode can be switched on and off by the driver.
The status is indicated by a symbol in the instrument
cluster.
P54.32-8851-00
Introduction of the New CLS-Class, Model Series 218 Coupe

Speed Limit Assist

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