How to turn on the heating air conditioner of Volkswagen Golf?

Volkswagen Golf adopts mechanical buttons, through which air defogging and warm air can be directly turned on. 1. The defogging button includes the front windshield and the rear windshield, and the defogging effect can be successfully achieved by pressing the relevant buttons. 2. Turn on the warm air by raising the temperature with the knob. In addition, when the cooling function is not used, the air conditioning function should be turned off. Because the compressor only works in the refrigeration stage of the air conditioner, the heating of the air conditioner depends on the heat of the engine coolant and the glass heating wire. 3. auto function liberates the owner's labor force, and air conditioning realizes automatic control function. The sensor recognizes the signal of the air in the car, intelligently controls the cooling/heating, and increases or decreases the air volume. 4. Internal/external circulation Internal circulation refers to heating or cooling the air inside the car and sending it back to the car. External circulation refers to the air outside the car entering the car. When traffic jams, tunnels and other external air quality is not up to standard, internal circulation is given priority. If the internal circulation of expressway section needs to be switched to external circulation periodically, the internal circulation time shall not exceed 1 hour. 5. After the temperature zone synchronization function is turned on, the temperature of the driver's seat will change, and other temperature zones will also change accordingly. In addition, after turning off this function, each partition can adjust the temperature independently, which is more humanized.