Traffic Sign Assist detects traffic signs with the multifunction camera and compares this with information in the digital navigation map. It assists you by displaying detected speed limits and overtaking restrictions in the driver display and in the head-up display. The system can issue a warning when you exceed the maximum permissible speed.
In some countries, the system can provide you with further functions and can warn you when you are approaching pedestrian crossings or when you are about to drive past stop signs or red lights unintentionally.
The camera also detects and analyses traffic signs with a restriction indicated by an additional sign (e.g. when wet).
Traffic Sign Assist only visualises selected signs in the driver display. Actual traffic signs and speed limits have priority over traffic signs and speed limits shown in the driver display.
select a speed adapted to the traffic, surroundings and weather conditions
observe actual traffic signs
observe applicable traffic rules and regulations
Observe the notes on driving systems and your responsibility; you may otherwise fail to recognise dangers More.
The system can show up to two traffic signs in the driver display simultaneously. The system always prioritises displaying speed limits. Up to one traffic sign with a maximum permissible speed can be shown in the head-up display. If two speed signs are shown in the driver display, for example, when speed limits are detected, the value of left-hand speed limit is transmitted to the limiter or Active Distance Assist DISTRONIC for adoption and is shown in the head-up display.
: speed limits
end of the speed limit
overtaking restrictions
play streets
signs showing the start or end of motorways
signs showing the start or end of dual carriageways
and, if necessary, analyse the relevance of the restrictions using other vehicle sensors: when wet
slippery road surfaces
in fog
temporary restrictions
exits
restrictions for car/trailer combinations
Traffic Sign Assist also uses data from the digital street map in the navigation system. When you leave or enter a municipality or change roads, on a motorway exit or slip road for example, or after you turn at a junction, the display in the driver display can thus be updated without a traffic sign having been detected.
In addition, the system can display speed limits ahead on the driver display and the head-up display. The driver display can also show the distance to an upcoming lower limit speed. For this purpose, information from the digital road map of the navigation system is used. Depending on the current situation and the assumed route, the display message is shown up to 350 m in advance. The Assistance menu can also display a dynamic visualisation of the speed limits ahead.
If Traffic Sign Assist cannot determine the currently applicable maximum permissible speed (e.g. due to missing signs), the following display appears in the driver display:
Traffic Sign Assist is not available in all countries. If the vehicle is in a country where Traffic Sign Assist is not supported, this is displayed continuously.
Also observe the information on display messages in Traffic Sign Assist More.
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 set the warning to visual only (the traffic sign flashes three times in the driver display) or visual and acoustic, including a warning tone.
Warning for no-entry signs: Traffic Sign Assist can warn you if you drive the wrong way down a section of road, for example on motorway slip roads or one-way streets.
Warning at pedestrian crossings: if you approach pedestrian crossings, provided that pedestrians are in the danger zone or are moving towards it, Traffic Sign Assist can warn you up to a speed of approximately 70 km/h.
Warning at stop signs: Traffic Sign Assist can warn you up to a speed of approximately 70 km/h if you are about to drive past a stop sign unintentionally. For this to be possible, the signs must be clear, for example if the system detects more than one stop sign, or a stop sign can be confirmed using the digital navigation map. No warning can be issued if several different signs are detected.
Warning at red lights: Traffic Sign Assist can warn you up to a speed of approximately 70 km/h if you are about to drive through a red light unintentionally.
Several traffic lights have been detected.
All traffic lights detected are red.
At least one of the red traffic lights detected is on the front passenger side beside the vehicle's own lane.
The traffic lights are in the following sequence (from top to bottom): red, yellow, green.
If the function is available, you can activate or deactivate the warnings at pedestrian crossings, stop signs and red lights in the Traffic Sign Assist menu under Further warningsMore.
If visibility is poor, e.g. due to insufficient illumination of the road, highly variable shade conditions, rain, snow, fog, swirling dust 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 traffic signs are difficult to detect, e.g. because they are dirty, covered, faded, covered with ice, damaged, badly positioned, poorly lit or twisted.
Active traffic signs with LED displays may not be detected correctly or at all due to technical factors, such as transmission frequency.
If the information on the navigation system's digital map is incorrect, incomplete or out of date.
If signs or the road layout is ambiguous, e.g. traffic signs in roadworks, at exits and ramps, in neighbouring lanes or parallel roads.
If signs do not conform to the standard.
If signs or road layouts are specific to the country and deviate from the route guidance in the navigation system, e.g. at or beyond construction sites.
After sharp turns and tight bends, when traffic signs are outside the camera's field of vision.
If you overtake vehicles with traffic signs which are affixed or attached to them.
If you are using transport equipment secured to the vehicle with a trailer coupling, such as a bicycle rack, restrictions for car/trailer combinations may be considered valid if applicable.