Why does the 2019 Audi A4 have a 48-volt mild hybrid system?

I'm interested in purchasing the 2019 Audi A4 and noticed that it comes with a 48-volt mild hybrid system. What is this system and how does it benefit the car's performance and efficiency?

The 48-volt mild hybrid system in the 2019 Audi A4 is a technology that helps improve fuel efficiency and performance. It uses a small electric motor to assist the gasoline engine during acceleration and reduces load on the engine while cruising. This results in better fuel economy and smoother driving experience.

The 48-volt mild hybrid system in the 2019 Audi A4 also allows for start-stop functionality, which shuts off the engine when the car is at a standstill. This reduces fuel consumption and emissions, making the A4 a more environmentally-friendly choice.