Driver Alert System (recommendation for rest breaks)
First read and observe the introductoryinformation and safety warnings
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Introduction
The Driver Alert System informs the driver if their driving shows signs of tiredness.
Fig. 13 On the instrument cluster display: Driver Alert System symbol.
Function and operation
The Driver Alert System determines the driving behaviour of the driver at the start of a journey and
uses this to calculate a fatigue assessment. This is continuously compared with the current
behaviour of the driver while driving. If the system detects that the driver may be tired, an acoustic
warning signal will sound and a symbol
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Fig. 13 will be displayed on the instrument cluster display
as a visual indication in combination with a supplementary text message. The message in the
instrument cluster display is displayed for about five seconds and may be repeated once. The last
displayed message is saved by the system.
The message on the instrument cluster display can be switched off by pressing the
button on the wiper lever or the
button on the multifunction steering wheel
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Operating the
instrument cluster . The message can be displayed again on the instrument cluster display using the
multifunction display
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Warning and information messages .
Function conditions
The driving behaviour can be evaluated only when the speed is above 60 km/h (37 mph) up to
approximately 200 km/h (125 mph).
Switching on and off
The Driver Alert System can be activated and deactivated in the vehicle settings in the Infotainment
system
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Vehicle settings menu .
Function limitations
The Driver Alert System has system-related limitations. The following conditions can limit the
function of the Driver Alert System, or prevent it from working altogether:
Speeds below 60 km/h (37 mph).
Speeds above 200 km/h (125 mph).
Twisting roads.
Poor roads.
Adverse weather conditions.
