What does the A button on a car mean?

[McLilah]

The A button on a car refers to the Auto Hold function. Auto Hold is an automatic braking feature that, when activated, eliminates the need to pull the handbrake while waiting at traffic lights, simplifying operations by avoiding the use of the handbrake or electronic parking brake. For automatic transmission models, it also reduces the need for frequent switching between D, N, and P gears. The functions of Auto Hold include: 1. Automatically applying the brakes to the wheels after the vehicle comes to a complete stop at traffic lights to prevent rolling; 2. Automatically braking to prevent rollback when starting on an uphill slope, releasing the wheels automatically to proceed forward after starting; 3. Automatically braking the wheels when parking and locking the vehicle without the need to pull the handbrake, though this feature is only available on certain models.