How to maximize fuel efficiency in my Audi A6?

I recently bought an Audi A6 and I noticed that my fuel consumption is higher than expected. What are some tips or modifications I can make to improve my car's fuel efficiency?

You can start by regularly checking and replacing your air filter. A dirty air filter can decrease your fuel efficiency by up to 10%. Also, make sure your tires are properly inflated to reduce rolling resistance.

Try using premium or high-octane fuel. While it may be more expensive, it can improve your car's performance and fuel efficiency.

Avoid rapid acceleration and hard braking, as they can waste fuel. Instead, try to maintain a steady speed while driving.