Traffic Sign Assist detects traffic signs with multifunction camera 
and assists you by displaying detected speed limits and overtaking restrictions in the instrument cluster, in the head unit and head-up display. 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. in wet conditions).
Traffic Sign 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 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.
The illustration shows the Instrument Display in the Widescreen Cockpit
Traffic Sign Assist also uses information in the navigation system. The display can therefore be updated without detecting traffic signs when you leave or enter a town or change roads, e.g. motorway exit or slip road.
Traffic Sign Assist is not available in all countries. If it is unavailable, display is shown in the speedometer.
Vehicles with Driving Assistance Package: the system can warn you if you approach a pedestrian crossing with your vehicle. A message appears in the instrument cluster.
The warning occurs 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, highly variable shade conditions, or due to rain, snow, fog or heavy spray.
The multifunction camera is affected by glare, e.g. from oncoming traffic, direct sunlight or reflections.
The windscreen is dirty in the area of the multifunction camera, or the camera is misted up, damaged or covered.
If the traffic signs are hard to detect, e.g. due to dirt or snow, or 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If the information in the navigation system's digital map is incorrect or out-of-date.
The signs are ambiguous, e.g. traffic signs on construction sites or in adjacent lanes.
If you turn sharply, you may pass traffic signs that are outside the camera's field of vision.