Traffic Sign Assist detects traffic signs with multifunction camera 
. It assists you by displaying detected speed limits and overtaking restrictions in the instrument cluster and optionally in the head-up display.
When the vehicle changes roads, e.g. slip road or motorway exit.
When a village or town boundary is passed which is stored in the digital map.
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 maximum permissible speed also depends on factors such as the road surface and traffic conditions.
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.
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, 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, 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If the information in the navigation system's digital map is incorrect or out-of-date.
If 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.