Mercedes-Benz C-Class Manuals

Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual: Traffic Sign Assist

Function of Traffic Sign Assist

Driving and driving safety systems

Traffic Sign Assist detects traffic signs with multifunction camera 1. It assists you by displaying detected speed limits and overtaking restrictions in the instrument cluster and optionally in the Head-up Display.

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:

  • When the vehicle changes roads, e.g. a freeway entry or exit road.
  • When a village or city boundary which is stored in the digital map is passed.

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.

Warning when the maximum permissible speed is exceeded

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.

Display in the Instrument Display

Driving and driving safety systems

Instrument Display in the Widescreen Cockpit

  1. Permissible speed
  2. Permissible speed when there is a restriction
  3. Additional sign with restriction

Driving and driving safety systems

Traffic Sign Assist is not available in all countries.

If it is unavailable, display 1 is shown in the speedometer.

System limitations

The system may be impaired or may not function in the following situations:

  • 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 windshield in the area of the multifunction camera is dirty, or if the camera is fogged 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 when traffic signs are outside the camera's field of vision.

Setting Traffic Sign Assist

Multimedia system:

Vehicle → Assistance → Traffic Sign Assist

Activating/deactivating automatic adoption of speed limits


  • Active Distance Assist DISTRONIC is activated.
  • Select Limit Adoption.
  • Activate or deactivate the function.

    The speed limits detected by Traffic Sign Assist are automatically adopted by Active Distance Assist DISTRONIC.

Displaying detected traffic signs in the media display

  • Select Display in COMAND.
  • Activate or deactivate the function.

When DISTRONIC or cruise control are activated, the speed detected can be manually adopted as the speed limit.

Adjusting the type of warning

  • Select Visual & Audible, Visual or None.

Adjusting the warning threshold

This value determines the speed at which a warning is issued when exceeded.

  • Select Warning Threshold.
  • Set the desired speed.

    Blind Spot Assist and Active Blind Spot Assist with exit warning

    See More:

    Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual > Instrument Display and on-board computer: Menus and submenus
    Functions on the service menu of the onboard computer On-board computer: Service To select the function: swipe upwards or downwards on the left-hand Touch Control. Press the left-hand Touch Control. Functions on the Service menu: Message memory Tires: Restart the tire pressure loss warning system Ch ...

    Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual

    Mercedes Benz C-Class (W204) 2007 - 2014 Training Manual

    © 2024 Copyright