Electrics
Page 9.6
Dynamic Cornering Light
The steering angle, vehicle speed and yaw rate serve as input values for
controlling the dynamic cornering light, which is integrated in the Bi-
Xenon light unit. This provides optimal illumination of the road during
cornering. The course of the road and any obstacles are detected ear-
lier. The dynamic cornering light is activated at speeds of 2 mph (3
km/h) or higher. The maximum adjustment angle of the headlight at the
inside of the bend is 15°, while the value for the headlight at the outside
of the bend is 7.5°.
The dynamic cornering light is activated as soon as the following
conditions are met:
• Dipped beam “ON” (via light switch) or
• the light sensor detects the need for lights “ON” and
• vehicle speed > 2 mph (3 km/h),
• engine rpm > 600 rpm,
• positive feedback after referencing the stepper motors.
Stepper Motors (auto. range adjustment, dynamic cornering light)
Each stepper motor is connected to the headlight control unit via an
interface. The headlight control unit calculates the required position into
which the stepper motor must move, and sends this information to the
stepper motor. If a stepper motor fails or malfunctions, a fault is stored
in the fault memory and the relevant emergency operation function is
initiated.
Each stepper motor is used for a different purpose:
• Stepper motor for automatic range adjustment.
• AFS stepper motor (dynamic cornering light).
During initialization, the headlight control unit checks the number of reg-
istered stepper motors. If a difference is detected, a fault is recorded.
Notes
Activating the high beam switches the
static cornering light off. In contrast, the
dynamic cornering light remains active
when travelling at 2 mph (3 km/h) or faster
even when high beam is active. This
improves visibility for the driver.
Notes
The power supply for the headlight control
unit and stepper motors comes directly
from a terminal 15 relay.
Bi-Xenon headlights when turning (static corner-
ing light active).
Bi-Xenon headlights during cornering (static and
dynamic cornering light active).
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