What does a circle with an 'a' inside mean on a car?

[GrahamFitz]

On a car, a circle with an 'a' inside refers to the auto-hold function. Vehicles equipped with electronic parking brakes usually come with the auto-hold feature, which is not enabled by default. To use this function, the driver needs to manually activate it. Auto-hold is an automatic braking function. If a vehicle has this feature, there's no need to shift to neutral or engage the handbrake; simply pressing the brake pedal will stop the car. To start moving again, just release the brake pedal and gently press the accelerator. It's important to note that when driving on steep slopes, it's advisable to avoid using auto-hold. Although the auto-hold duration is very brief, the engine's start-stop on a slope might lead to insufficient power assistance.