What does 123456 mean on a BMW car?

[VonSerenity]

The 123456 on a BMW car refers to setting shortcut keys for function storage. BMW's interior/exterior circulation function: Interior circulation means the air inside the car is heated or cooled and then recirculated back into the car, while exterior circulation allows outside air to enter the car. Generally, interior circulation is turned on in congested traffic or when the outside air quality is poor. On highways, it is recommended to switch to exterior circulation approximately every hour to replace the air inside and outside the car to prevent oxygen deprivation. BMW's temperature zone synchronization function: When the temperature zone synchronization function is activated, changing the temperature in the driver's seat will synchronize the changes in the other temperature zones. Additionally, when this function is turned off, each zone can be adjusted individually for a more personalized experience. BMW's automatic parking function: When stopping at traffic lights or similar situations, after releasing the brake pedal, the automatic parking function will lock the wheels, relieving the driver's foot fatigue. When the driver presses the accelerator pedal again, the electronic parking will unlock the wheels.