To do this, you need to perform a series of simple actions.
1. The key is in the ON position (the light bulb on the dashboard must fire).
2. Fan speed at position 0 (B).
3. Insert the windscreen (C) into the right position.
4. Press the A/C button (E) and hold it. Then press the Recycling button (D) for 5 consecutive times within 3 seconds.
5. The recycling button shall blink three times-a sign that the operation is correct.
