Why is my Audi A7 experiencing decreased fuel efficiency?

I've noticed that my Audi A7's fuel efficiency has been decreasing lately. What could be causing this issue and how can I improve it?

Firstly, it is important to regularly maintain your Audi A7 to ensure optimal fuel efficiency. You may need to check your air filter and spark plugs for any dirt or damage.

Another factor that can affect your fuel efficiency is your driving habits. Driving at high speeds and frequent acceleration can use up more fuel. Try to maintain a steady speed and avoid unnecessary acceleration.