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Activating HDC
Press the button; the LED above the
button lights up.
The LED flashes when the brakes are applied
automatically.
Deactivating HDC
Press the button again; the LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h.
Using HDC
HDC can be used in every driving position.
Displays in the instrument cluster
1 Display for target speed
2 HDC display
Malfunction
If the HDC display goes out during HDC opera‐
tion or is not displayed: HDC is not available
due to high brake temperatures or DSC has
failed.
Drive-off assistant
This system supports driving away on gradi‐
ents. The parking brake is not required.
1. Hold the vehicle in place with the foot
brake.
2. Release the foot brake and drive away
without delay.
Depending on the vehicle load, the vehicle may
roll back slightly.
Driving off without delay
After releasing the foot brake, start driv‐
ing without delay, since the drive-off assistant
will not hold the vehicle in place for more than
approx. 2 seconds and the vehicle will begin
rolling back.◀
Servotronic
The concept
The Servotronic varies the steering force re‐
quired to turn the wheels depending on the
speed at which you are driving.
Power steering provides strong support at low
speeds, which means that less effort is needed
to turn the wheels. Power steering support
lessens as your speed increases.
Malfunction
The warning lamp lights up.A mes‐
sage appears on the Control Display.
Servotronic is malfunctioning or has
failed. Have the system checked as soon as
possible.
Seite 102
Controls Driving stability control systems
102
Online Edition for Part no. 01 40 2 954 052 - II/15
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