Why does the Audi A7 have a 48-volt mild-hybrid system?

I'm considering buying an Audi A7 and I noticed that it comes with a 48-volt mild-hybrid system. What benefits does this system offer and is it worth the extra cost?

The 48-volt mild-hybrid system in the Audi A7 offers a number of benefits such as improved fuel efficiency, smoother and quicker acceleration, and reduced emissions. It also allows for more advanced features like coasting with the engine off and improved start-stop functionality. As for whether it's worth the extra cost, it ultimately depends on your budget and driving habits. If you often drive in heavy traffic or city areas, the mild-hybrid system can make a significant difference in fuel savings.