What is what does a with a circle around it mean in a car?

The symbol "Ⓐ" (an "A" with a circle around it) in a car typically indicates the automatic engine start/stop system. This system, also known as auto start-stop or stop-start, is designed to improve fuel efficiency and reduce emissions.

Here's a breakdown:

• Function: When the car comes to a complete stop (e.g., at a traffic light), the engine automatically shuts off. When the driver releases the brake pedal or presses the accelerator, the engine restarts automatically.

• Purpose: This feature prevents the engine from idling unnecessarily, saving fuel and reducing exhaust emissions.

• Indicator: The "Ⓐ" symbol illuminates on the dashboard to indicate that the system is active. It might also appear when the system is ready to activate at the next stop.

• Deactivation: In most cars, there is a button (often featuring the same "Ⓐ" symbol) that allows the driver to manually deactivate the auto start-stop system. However, the system usually reactivates each time the car is started.

Here are some link suggestions to learn more about the subject:

• Automatic Engine Start/Stop System
• Auto Start-Stop
• Stop-Start