Press the A/C button to activate the BMW 5 Series air conditioning system, and the indicator light on the button will illuminate. Below is an introduction to the BMW 5 Series: 1. To turn off the automatic air conditioning in the BMW 5 Series, press the air volume adjustment button repeatedly until the system shuts off. The automatic adjustment functions of the car air conditioning include automatic temperature and humidity control, automatic control of air recirculation and ventilation modes, as well as operation modes and air exchange volume control. 2. The vehicle air conditioning system consists of a compressor, condenser, throttle element, evaporator, fan, and necessary control components, designed to regulate the temperature and humidity inside the car and provide a comfortable environment for passengers. 3. When defogging is needed, turn on the external circulation. This is common in winter when fog often forms on the windshield due to the significant temperature difference between the inside and outside of the car. If external circulation is activated with the windshield defogging mode, the fog will gradually disappear. 4. When parked on the roadside waiting for someone. Both winter and summer require the use of air conditioning due to different weather conditions. In summer, using external circulation while waiting in the car ensures air circulation, preventing stuffiness and carbon monoxide poisoning. In winter, external circulation brings the engine's heat into the car, keeping it from getting too cold. 5. The BMW 5 Series' automatic air conditioning feature upon ignition occurs if the system was not turned off before the last shutdown. If the same key is used to start the car, the air conditioning will automatically activate at the previous temperature setting. If the air conditioning is turned off before exiting the car, it will not automatically turn on during the next start-up.
