Execution order
1. Turn the air supply and blower rotary control on the left slowly from left to right: the air supply is open, the blower increases its speed by four steps.
2. Turn the rotary control in the middle to the right to set the heating power: the heating power increases. Air is supplied through the heat exchanger.
3. Turn the knob to the left: the heating power decreases. The air flow bypasses the heat exchanger.
4. Place the rotary control on the right, which is used to distribute the air flow, under the symbols on the scale one by one: the lever, moved from left to right, causes air to flow: a) from the nozzles in the middle of the dashboard, b) from the nozzles in the footwell, or c) from the heater nozzles under the windshield.
5. In the regulator position b) and c), a certain amount of air is supplied additionally from the middle nozzles, if they are not covered by knurled rollers.