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  • V-Class
  • 06/2020
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Function of ATTENTION ASSIST

ATTENTION ASSIST can assist you on long, monotonous journeys, e.g. on motorways and trunk roads. If ATTENTION ASSIST detects indicators of fatigue or increased lapses in concentration on the part of the driver, it suggests taking a break.

ATTENTION ASSIST is only an aid. It cannot always detect drowsiness or increased lapses in concentration in good time. The system is not a substitute for a well-rested and attentive driver. On long journeys, take regular and timely breaks that allow you to rest properly.

If fatigue or increased lapses in concentration are detected, the ATTENTION ASSIST: Take a break! warning appears in the instrument cluster.

You can acknowledge the message and take a break if necessary. If you do not take a break and ATTENTION ASSIST continues to detect increased lapses in concentration, you will be warned again after a minimum of 15 minutes.

If a warning is displayed in the instrument cluster the multimedia system offers to search for a rest area. You can select a rest area and start navigation to this rest area. This function can be activated and deactivated in the multimedia system.

You can have the current ATTENTION ASSIST assessment displayed using the Assistance graphic menu in the on-board computer More.

The following information is displayed:

  • the journey length since the last break

  • the attention level determined by ATTENTION ASSIST:

    • the fuller the bar is, the higher the detected attention level is

    • the bar empties as attentiveness decreases

If ATTENTION ASSIST cannot calculate the attention level and cannot issue a warning, the System suspended message appears.

The bar display is then dimmed. This is the case, for example, if you are predominantly driving at a speed below 60 km/h or above 200 km/h.

System limits

ATTENTION ASSIST is active in the 60 km/h to 200 km/h speed range.

The functionality of ATTENTION ASSIST is restricted, and warnings may be delayed or not occur at all, in the following situations:

  • the journey lasts less than approximately 30 minutes

  • the road condition is poor (uneven road surface or potholes)

  • the vehicle is subjected to a strong crosswind

  • you have a sporty driving style (high cornering speeds or high rates of acceleration)

  • the time is set incorrectly

  • you change lanes and vary your speed frequently in active driving situations

The ATTENTION ASSIST drowsiness or alertness assessment is deleted and restarted when continuing the journey in the following situations:

  • if you switch off the engine

  • you unfasten your seat belt and open the driver's door (e.g. change drivers or take a break)

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