Limitations of Road Sign Information*

The Road Sign Information (RSI1) function may have limitations in certain situations.
Examples of what can reduce the function are as follows:
  • Faded signs
  • Signs positioned on bends
  • Rotated or damaged signs
  • Signs positioned high above the roadway
  • Fully/partially obscured or poorly positioned signs
  • signs completely or partly covered with frost, snow and/or dirt
  • digital road maps2 are out-of-date, inaccurate or have no speed information3.


The RSI function may interpret some types of bicycle rack, connected to the electrical socket for trailers, as a connected trailer. In such cases, the driver display may show incorrect speed information.


This function uses the car's camera and radar units, which have certain general limitations.
  1. * Option/accessory.
  2. 1 Road Sign Information
  3. 2 In cars equipped with Sensus Navigation*.
  4. 3 Map data with speed information does not exist for all areas.

Did this help?