How to maintain optimal fuel efficiency in a Audi A2?

I have noticed a decrease in my Audi A2's fuel efficiency lately. What are some ways to keep it at its optimal level?

One way to maintain optimal fuel efficiency in your Audi A2 is to make sure your tires are properly inflated. Under-inflated tires can cause your car to use more fuel.

Another important aspect is to regularly change your air filter, as a clogged air filter can reduce airflow and decrease fuel efficiency.

Avoid aggressive driving habits, such as speeding and rapid acceleration, as they can significantly impact your Audi A2's fuel consumption.