Activating
Switch position 
with the
ignition switched
on.
The turning lamps are automatically switched on depending on the steering angle or the use of turn signals.
To avoid blinding oncoming traffic, the Adaptive Light Control directs light towards the front passenger side when the vehicle is at a standstill.
When driving in reverse, only the turning lamp is active.
See also:
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Deactivating HDC
Press the button again and the
LED goes
out. HDC is automatically deactivated
above approx. 37 mph/60 km/h. ...