What does the button with an 'a' and a circle mean in a car?

[StLandon]

The button with an 'a' and a circle represents the auto start-stop function. Here's how to use it: 1. After starting the car, the auto start-stop function will be activated. For example, when approaching a traffic light, if you press the brake for 1 to 2 seconds after stopping, this function will automatically turn off the engine. To restart when the light turns green, simply lightly press the accelerator or turn the steering wheel, and the engine will start again; 2. In congested traffic or when parking, you can choose to turn off this function. Some car models are equipped with both auto hold and auto start-stop functions, allowing you to relieve foot fatigue by not needing to press the brake pedal, while also improving the vehicle's fuel economy. The auto start-stop will turn off the engine for a short period, but without the auto hold function, you cannot release the brake pedal.