Driver assist systems › Driver Alert fatigue detection assistant 167
forms measures as safely as possible to decelerate
the vehicle to a stop.
Settings
Automatic activation
The system is automatically activated when the igni-
tion is switched on.
The assist systems are only available for vehicles
with an automatic gearbox.
Functionality
Troubleshooting
When the assist system detects inactivity on the
part of the driver
Crew Protect Assist faulty
illuminates together with
Message concerning unavailability or function-
al restriction
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.
▶
Seek the help of a specialist garage.
›
Driver Alert fatigue detection assistant
Functionality
After the vehicle has come to a standstill, the park-
ing brake is switched on. Depending on the equip-
ment, an emergency call can be initiated.
▶
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.
Interruption of automatic braking
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.
✓ Assist system for emergency situations is activa-
Resetting the break recommendation
The break recommendation is reset in the following
cases:
ted.
✓ Lane Assist is activated and the boundary lines of
the traffic lane are recognised.
The vehicle stops and the ignition is switched off
The vehicle stops, the seat belt is removed and the
driver's door is opened
▶
▶
Settings
The vehicle stops for more than 15 minutes
▶
Automatic activation
The Assistant is automatically activated when the ig-
nition is switched on.
In some situations, the system may erroneously
issue a break recommendation.
Activation/deactivation
In the Infotainment system, in the menu
.
Operating conditions
✓ Driving speed between 60-200 km/h.
Hill descent assistant
Functionality
Settings
Activation/deactivation
In the Infotainment system, in the menu
.
The Hill Hold Control helps to maintain a constant
speed when driving downhill through automatic
brake interventions.
The system also works when driving in neutral or
when reverse gear is engaged.
Emergency situation assist
systemEmergency Assist
WARNING
Risk of an accident!
The system cannot properly fulfil its function on slu-
shy soil for physical reasons, e.g. ice or mud.
Usage
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-
Status display in the instrument cluster display
lit up in grey – the system is activated
English 
