How can I increase the fuel efficiency in my Audi A4?

I have been noticing that my Audi A4's fuel efficiency has been decreasing lately. I am wondering if there are any specific steps I can take to improve it? I have already tried changing the air filters and keeping up with regular maintenance checks.

The first thing you should do is check your tire pressure regularly. Under-inflated tires can greatly impact fuel efficiency. Consider investing in low rolling-resistance tires for even better results. Keeping your car clean also helps with reducing drag and improving fuel economy.

Try to avoid heavy acceleration and sudden braking while driving. This reduces fuel efficiency by up to 15%. It's also a good idea to plan your routes ahead of time to avoid any unnecessary trips or traffic jams.