How does the automatic start-stop system work in the Audi A1?

I am wondering about the specifics of the automatic start-stop system in the Audi A1. How does it save fuel and reduce emissions?

The automatic start-stop system in the Audi A1 works by automatically turning off the engine when the car comes to a stop, and restarting it when the brake is released.

This feature helps to save fuel and reduce emissions by preventing idling and unnecessary engine use.

It also provides a smoother driving experience by quickly restarting the engine when needed, without any delay or hesitation.