What does the A button in a car mean?

[LawsonRose]

The A button in a car refers to the Auto Hold system. When this switch is activated, the vehicle will not move even after releasing the brake during driving; it will only resume movement when the accelerator is pressed, automatically canceling the hold. If you wish to turn it off, you must manually deactivate it. The Auto Hold system (AUTOHOLD) is a technological application that enables automatic handbrake functionality while the car is in motion. This technology allows drivers to avoid prolonged braking when the vehicle is stopped, preventing unnecessary rolling when the automatic electronic parking brake is engaged, especially on slopes or during frequent stops. The Auto Hold system and the electronic parking brake (EPB: Electronic Parking Brake, formally known as Electromechanical Parking Brake) can form an intelligent braking control system, integrating temporary braking during driving with long-term braking after parking, achieving parking brake functionality through electronic control.