See also:

Malfunction
The warning lamp lights up yellow and a message is shown on the Control Display. The active steering is defective or has been temporarily deactivated. At low speeds, greater steering wheel ...

Switching the system on/off
Switching off At the lowest fan speed, press the left side of the button on the driver's side. Switching on Press any button. ...

Removing the mobile phone
  Press the button and remove the mobile phone. ...