How do I increase the fuel efficiency of my Audi A8?

I have been noticing that my Audi A8's fuel efficiency has been declining. Is there anything I can do to improve it?

Regularly check your tire pressure and make sure it's at the recommended level. Improperly inflated tires can cause your fuel efficiency to decrease.

Check your air filter and replace it if necessary. A dirty air filter can reduce your car's fuel efficiency.

Avoid aggressive driving and maintain a steady speed. Rapid acceleration and braking can significantly decrease your fuel efficiency.