186 Driver assist systems › Driver Alert fatigue detection assistant
Troubleshooting
Functionality
Crew Protect Assist faulty
illuminates together with
Message concerning unavailability or function-
al restriction
When the assist system detects inactivity on the
part of the driver
An acoustic warning signal sounds and a message
appears in the instrument cluster display.
▶
If, after repeated warnings, the driver does not
take over the steering, the hazard warning lights
are switched on and the vehicle automatically
brakes.
After the vehicle has come to a standstill, the park-
ing brake is switched on.
▶
Seek the help of a specialist garage.
›
Driver Alert fatigue detection assistant
Functionality
▶
Interruption of automatic braking
Driver Alert evaluates the steering behaviour. If it de-
tects fatigue in the driver, a break is recommended.
In the display of the instrument cluster, the following
symbol lights up from the isolation box.
By pressing the brake or accelerator pedal
▶
By actively steering
▶
WARNING
Operating conditions
There will be no system warning during the so-called
micro-sleep.
✓ Lane Assist is activated and the boundary lines of
the traffic lane are recognised.
✓ ACC is enabled.
Resetting the break recommendation
The break recommendation is reset in the following
cases:
The vehicle stops and the ignition is switched off
The vehicle stops, the seat belt is removed and the
driver's door is opened
▶
▶
Hill descent assistant
Functionality
The vehicle stops for more than 15 minutes
▶
The Hill Hold Control helps to maintain a constant
speed when driving downhill through automatic
brake interventions.
In some situations, the system may erroneously
issue a break recommendation.
The system also works when driving in neutral or
when reverse gear is engaged.
Operating conditions
WARNING
Risk of an accident!
✓ Driving speed between 60-200 km/h.
The system cannot properly fulfil its function on slu-
shy soil for physical reasons, e.g. ice or mud.
Settings
Status display in the instrument cluster display
lit up in grey – the system is activated
Activation/deactivation
In the Infotainment system, in the menu
.
lit up white / green - the system intervenes
Change speed
The driving speed can be changed by pressing the
brake or accelerator pedal. After releasing the pedal,
the assist system maintains the current speed.
Emergency situation assist
systemEmergency Assist
Usage
Operating conditions
The assist systems for emergencies detect inactivity
of the driver, which, for example, can be caused by a
sudden loss of consciousness. The system then per-
forms measures as safely as possible to decelerate
the vehicle to a stop.
✓ The engine is running.
✓ Offroad is activated.
✓ The slope is at least 10 %.
✓ Neither the accelerator nor the brake pedal is
pressed.
The assist systems are only available for vehicles
with an automatic gearbox.
✓ The vehicle speed is max. 30 km/h.
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