Traffic Sign Assist detects traffic signs with the multifunction camera More. It assists you by displaying detected speed limits and overtaking restrictions in the instrument cluster.
Observe the notes on driving systems and your responsibility; you may otherwise fail to recognise dangers More.
Since Traffic Sign Assist also uses the data stored in the navigation system, it can update the display in the following situations without detecting traffic signs.
If the system detects that you are driving onto a section of road in the wrong direction of travel, it triggers a warning.
The camera also detects traffic signs with a restriction indicated by an additional sign (e.g. when wet).
The system can warn you if you unintentionally exceed the maximum permissible speed. To do this, you can specify in the multimedia system by how much the maximum permissible speed can be exceeded before a warning is issued. You can specify whether the warning is to be just a visual warning or an acoustic one as well.
Vehicles with a standard Instrument Display: a + symbol next to a traffic sign in the Instrument Display indicates that additional traffic signs have been detected. These can also be displayed in the media display and optionally in the head-up display.
If Traffic Sign Assist cannot determine the current maximum permissible speed (e.g. due to missing signs), the following display appears in the Instrument Display:
This is displayed continuously if the vehicle is in a country where Traffic Sign Assist is not supported. Traffic Sign Assist is not available in all countries.
Also observe the information on display messages in Traffic Sign Assist More.
The system can warn you if you approach a pedestrian crossing with your vehicle. The message 
Watch for pedestrians appears in the instrument cluster.
The warning occurs only if appropriate traffic signs or road markings are detected and pedestrians are present in the danger zone.
If there is poor visibility, e.g. due to insufficient illumination of the road, if there are highly variable shade conditions or in rain, snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic, direct sunlight or reflections.
If the windscreen in the area of the multifunction camera is dirty, or if the camera is misted up, damaged or covered.
If the traffic signs are hard to detect, e.g. due to dirt or snow, because they are covered, or due to insufficient lighting.
If the information in the navigation system's digital map is incorrect or out-of-date.
If the signs are ambiguous, e.g. traffic signs on construction sites or in adjacent lanes.
If you turn sharply, when passing traffic signs outside the camera's field of vision.