Driver Alert System (recommendation for rest breaks)
Fig. 1 On the instrument cluster display: Driver Alert System symbol.
The Driver Alert System informs the driver if their driving shows signs of tiredness.
Function and operation
The Driver Alert System determines the driving behaviour at the beginning of a journey and uses
it to evaluate the tiredness of the driver. This is compared to the behaviour of the driver while
actually driving. If the system detects driver fatigue, an acoustic warning signal will sound and a
symbol will be displayed on the instrument cluster display together with a supplementary text
message → Fig. 1 . 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. The message
can be displayed again on the instrument cluster display using the multifunction display (→
Warning and information messages, Description).
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 (→ Vehicle settings menu, Operation).
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 less than 60 km/h (37 mph).
—Speeds of more than 200 km/h (125 mph).
—Twisting roads.
—Poor roads.
—Adverse weather conditions.
—Sporty driving style.
—The driver is distracted.
The Driver Alert System is reset in the following situations:
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