How can I improve the fuel efficiency of my Audi A2 engine?

I have been experiencing lower than expected fuel efficiency in my Audi A2 engine. Are there any tips or recommendations for improving this?

One way to improve fuel efficiency in your Audi A2 is to regularly check and maintain your tire pressure. Under-inflated tires can cause your engine to work harder and use more fuel. Keeping your tires properly inflated can improve gas mileage by up to 3%. Additionally, make sure to replace any old or dirty air filters, as these can also affect fuel efficiency.