▷ Press the rocker switch up: the speed in‐
creases gradually.
▷ Press the rocker switch up and hold: the
speed increases while the rocker switch is
pressed.
▷ Press the rocker switch down: the speed de‐
creases gradually.
▷ Press the rocker switch down and hold: the
speed decreases while the rocker switch is
pressed.
Using the brake pedal
While HDC is controlling the speed, the set
speed can be reduced by depressing the brake
pedal.
Deactivating HDC
Press the button again.
The LED goes out.
HDC is automatically deactivated above approx.
25 mph/40 km/h.
Malfunction
If a malfunction occurs, a message is displayed in
the instrument cluster.
Integral Active Steering
Principle
The Integral Active Steering increases the ma‐
neuverability and makes a more direct steering
response possible.
General information
Integral Active Steering is a combination of varia‐
ble steering ratio and rear axle steering.
The steering is more direct because the variable
steering ratio amplifies the wheel angle while
maneuvering. The rear axle steering acts to in‐
crease maneuverability at low speeds by turning
the rear wheels slightly in the opposite direction
to the front wheels.
At higher speeds, the rear wheels are turned in
the same direction as the front wheels. For in‐
stance, this results in a harmonious lane change.
In critical driving situations, the Integral Active
Steering can stabilize the vehicle through pur‐
poseful steering of the rear wheels before the
driver intervenes, for instance in case of over‐
steering.
Tuning
The system offers several different tunings.
Driving mode Integral Active Steering
COMFORT
ECO PRO
Comfortable, for optimal
travel comfort.
SPORT Dynamic, for greater agility.
The different tunings are assigned to the differ‐
ent driving modes of the Driving Dynamics Con‐
trol.
Additional information:
Driving Dynamics Control, refer to page 148.
Using tire chains
In order to guarantee free movement of the
wheels when operating with tire chains, rear axle
steering of the integral active steering must be
switched off when tire chains are mounted.
Additional information:
Rear axle steering during operation with tire
chains, refer to page 372.
Seite 233
Driving stability control systems
CONTROLS
233
Online Edition for Part no. 01405A385B6 - VI/21
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