The engine start-stop feature is a feature found in many modern cars that is designed to automatically turn off the car's engine when the car comes to a stop, such as at a traffic light or in heavy traffic, and then automatically restarts the engine when the driver releases the brake pedal and presses the accelerator pedal again. This feature is designed to improve fuel efficiency and reduce emissions by preventing unnecessary idling of the engine when the car is stopped.

When the engine start-stop feature is engaged, the car's sensors detect when the car has come to a complete stop, and then automatically shut off the engine to conserve fuel. The car's battery and electrical systems continue to operate, so the car's accessories and electronics, such as the air conditioning and infotainment system, continue to function as normal.

When the driver is ready to resume driving, they simply release the brake pedal, and the engine restarts automatically, without any additional input from the driver. In some cars, the engine start-stop feature can be disabled, either temporarily or permanently, depending on the car's settings and the driver's preferences.

Overall, the engine start-stop feature is designed to provide a more efficient and eco-friendly driving experience, while still providing the driver with all the features and functions they expect from a modern car.