How does the 2021 Audi A5's start-stop system work?

I'm curious about the functionality of the 2021 Audi A5's start-stop system. Can someone explain how it works and if it has any potential drawbacks?

The 2021 Audi A5's start-stop system automatically shuts off the engine while idling at a stoplight or in traffic to conserve fuel. The engine will restart when the driver releases the brake pedal. Some drivers find it takes a little getting used to, but overall it can help increase fuel efficiency.

The start-stop system in the 2021 Audi A5 is also known as a smart alternator system. It works by shutting off the engine when the car is stopped and the accelerator is not pressed. This helps reduce harmful emissions and save on gas, especially in city driving. However, it may not be ideal for those who prefer a completely quiet driving experience.