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  • S-Class
  • Maybach saloon
  • 08/2021
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Function of ATTENTION ASSIST with microsleep detection

The microsleep detection subfunction is only available in combination with the driver camera.

ATTENTION ASSIST assists you on long, monotonous journeys, e.g. on motorways and trunk roads. If indicators of fatigue or increasing lapses in concentration on the part of the driver are detected, the system suggests taking a break.

ATTENTION ASSIST is only an aid. It cannot always detect fatigue or lapses in concentration in time. The system is not a substitute for a well-rested and attentive driver. On long journeys, take regular breaks in good time that allow for adequate recuperation.

You can choose between two settings:

  • Standard: normal system sensitivity.

  • Sensitive: higher system sensitivity. The driver is warned earlier and the attention level detected by ATTENTION ASSIST is adapted accordingly.

If drowsiness or increasing lapses in concentration are detected, the ATTENTION ASSIST: Take a break! warning appears in the driver's display. You can acknowledge the message and take a break where necessary. If you do not take a break and ATTENTION ASSIST continues to detect increasing lapses in concentration, you will be warned again after a minimum of 15 minutes.

The following information is displayed in the driver's display:

  • The length of the journey since the last break

  • The attention level determined by ATTENTION ASSIST:

    • The more segments of the circle displayed, the higher the detected attention level.

    • Fewer segments are displayed in the circle as the attention level decreases.

  • Microsleep detection status:

    • Deactivated: display is hidden.

    • Activated but not operational: display is grey.

    • Activated and operational: display is green.

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

If the system, which uses the driver camera, detects indicators of microsleep, the ATTENTION ASSIST Microsleep Take a break! warning message appears in the driver's display and a warning tone sounds simultaneously. This warning message must be confirmed by Touch Control. It is recommended that you take a break immediately.

If a warning is given in the driver's display, the multimedia system offers to search for a rest area. You can select a rest area and start navigation to this rest area.

If you restart the vehicle, ATTENTION ASSIST with microsleep detection is automatically activated. The last selected sensitivity level remains stored.

System limits

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

The microsleep detection function is available at a speed of 20 km/h and above.

When DRIVE PILOT is active, ATTENTION ASSIST with microsleep detection is passive.

Particularly in the following situations, ATTENTION ASSIST only functions in a restricted manner and warnings may be delayed or not occur:

  • If you have been driving for less than approximately 30 minutes.

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

  • If there is a strong side wind.

  • If you adopt a sporty driving style (high cornering speeds or high rates of acceleration).

  • If the Steering Assist function of Active Distance Assist DISTRONIC is active.

  • If the clock is set to the incorrect time.

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

Microsleep detection also does not function when the driver camera cannot detect the driver's eyes, for example as a result of the following factors:

  • The driver's eyes are covered due to the steering column position, for example.

  • Poor lighting conditions.

  • Some types of spectacles or sunglasses.

  • The driver's line of vision is outside the driver camera's field of vision.

Also observe any information regarding display messages that can be displayed in the driver's display.

The tiredness and alertness assessment of ATTENTION ASSIST with microsleep detection is reset and restarted when continuing the journey in the following situations:

  • You switch off the vehicle.

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

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