How does the Audi A5's 48-volt mild hybrid system improve fuel efficiency?

I've heard that the Audi A5 has a 48-volt mild hybrid system, but I'm not sure how it works and if it actually makes a difference in terms of fuel efficiency. Can someone explain it to me?

Yes, the 48-volt mild hybrid system on the Audi A5 does indeed improve fuel efficiency. It works by using a small electric motor to assist the engine during acceleration and deceleration, reducing the load on the engine and therefore reducing fuel consumption. This can lead to an improvement of up to 10% in overall fuel efficiency.

The 48-volt mild hybrid system on the Audi A5 also allows for a smoother and more seamless start-stop function. The electric motor can quickly and efficiently restart the engine after it shuts off during a stop, saving fuel and reducing emissions. This is especially useful in stop-and-go traffic.