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

The symbol of an "A" with a circle around it in a car typically indicates the automatic start/stop system.

This system is designed to improve fuel efficiency by automatically shutting off the engine when the vehicle is stationary (e.g., at a red light or in traffic) and then restarting it when the driver releases the brake pedal or presses the accelerator. When the "A" with a circle is illuminated, it usually means that the system is active and ready to engage. It may also have a line through it, which typically indicates that the system is disabled, either manually by the driver or due to certain conditions not being met (e.g., low battery, engine not at optimal temperature, etc.). Refer to your car's owner manual for specific details about its operation.

Here are some related subjects:

• Automatic Start/Stop System
• Fuel Efficiency