What are the symbols for BMW's internal and external air circulation?
2 Answers
In BMW vehicles, the letter 'A' illuminated indicates external air circulation, while the letter 'M' illuminated represents internal air circulation. Below is an introduction to the related content: 1. Letter symbols: The central control button features both the letter 'A' and the letter 'M' on the same button. 2. Appearance shape: There is also a shape resembling the exterior of a vehicle, with a curved arrow inside. Below are the differences between internal and external air circulation in terms of closing the air intake: 1. Internal circulation: When using internal circulation, the vehicle's interior space acts like a sealed environment. Whether it's cold or hot air blown by the air conditioning, it circulates within the car, with no fresh air entering. 2. External circulation: When external circulation is turned on, fresh air from outside flows into the car, improving the air quality inside the vehicle, which is also a beneficial way to use it.
When I drive my BMW, I often use its air conditioning system. The recirculation button is particularly easy to recognize—it's a round button on the dashboard or center console with a small car outline inside and arrows circulating within the car, indicating that the air inside the car is being recirculated without drawing in outside air. The fresh air mode button is also typically a round button, but with arrows pointing from outside into the car, representing drawing in fresh air from outside. I think BMW's design is quite intuitive. For example, when I'm stuck in city traffic and worried about exhaust pollution, I simply press the recirculation button to block out dust. When driving in the countryside with cleaner air, I switch to fresh air mode to breathe in fresh air. The location of these buttons may vary depending on the model, either on the center console or near the steering wheel, but they all have backlighting, making them visible at night. The key is to regularly clean the filter—I replace mine every six months to avoid odors and dust buildup. Using recirculation for too long can make the air stale and affect health, so I only use it for short periods. BMW's automatic mode is also quite smart, automatically switching modes based on the cabin temperature, which makes things much easier.
