How to increase the fuel efficiency in Audi A2?

I have been noticing a decrease in the fuel efficiency of my Audi A2. What could be the possible reasons for this and how can it be improved?

Regularly servicing your car and making sure all the filters and fluids are clean and in good condition can greatly improve the fuel efficiency of your Audi A2. It is important to follow the manufacturer's recommendations for servicing intervals.

Check your tire pressure regularly. Underinflated tires can decrease fuel efficiency by up to 5%. Make sure to check the pressure at least once a month and before long trips.

Avoid aggressive driving habits such as rapid acceleration and braking, as these can significantly decrease fuel efficiency. Drive at a consistent speed and use cruise control whenever possible.