The availability of the following function is country-dependent.
Speed Limit Assist detects speed limits with multifunction camera 
and displays them in the instrument cluster and optionally in the head-up display. The camera also detects speed limits with a restriction indicated by an additional sign (e.g. in wet conditions). The system detects stop signs, thereby preventing the engine from being switched off by the ECO start/stop function.
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.
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
If there is poor visibility, e.g. due to insufficient illumination of the road, highly variable shade conditions, rain, snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic, direct sunlight or reflections.
If there is dirt on the windscreen in the vicinity of the multifunction camera or the camera is misted up, damaged or obscured.
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 you turn sharply, you may pass traffic signs that are outside the camera's field of vision.