Why does the Audi A7 have a low drag coefficient?

I've noticed that the Audi A7 has a drag coefficient of only 0.29, which is lower than most cars in its class. What design elements contribute to this low drag coefficient and how does it affect the car's performance?

The smooth, sleek design of the Audi A7 helps to reduce resistance and turbulence, leading to a lower drag coefficient. This not only enhances the car's aerodynamics, but also improves fuel efficiency and overall performance. -Alex Johnson