What does the A button in a sedan mean?

[Victor]

Sedan A button refers to the Auto Hold system. When this switch is turned on, after the vehicle is braked to a stop during driving, even if the brake is released, the vehicle will not continue to move. It will only resume driving when the accelerator is pressed, and can only be turned off manually. The Auto Hold system is a technological application that enables automatic handbrake function during vehicle operation. This technology allows drivers to avoid prolonged braking when the vehicle is stationary, and prevents unnecessary vehicle slippage when the automatic electronic parking brake is engaged.