How does the hybrid system in the Audi A6 help with fuel efficiency?

I've been considering purchasing an Audi A6, but I am curious about how the hybrid system works. Can anyone explain how it contributes to fuel efficiency and if it is worth the extra cost?

The hybrid system in the Audi A6 consists of a gasoline engine, electric motor, and lithium-ion battery. It is able to seamlessly switch between the two power sources for optimal efficiency. In urban driving, the electric motor will be used more often, reducing fuel consumption. Overall, the hybrid system can increase fuel efficiency by up to 25%. In my experience, it is definitely worth the extra cost.

When the Audi A6 is decelerating or coasting, the hybrid system will recharge the battery using energy that would normally be lost. This regenerative braking helps to increase the efficiency of the vehicle. I have found that on long commutes, this feature can make a noticeable difference in fuel consumption.

The hybrid system in the Audi A6 also has a start-stop function, which turns off the engine when the car is stationary. This can save fuel, especially in stop-and-go traffic. However, some drivers find this feature to be a bit jarring. It's important to test it out during a test drive to see if it works well for you.