How can I change the oil filter on my Audi A4?

I want to change the oil filter on my Audi A4 to save money on maintenance costs. What steps should I take and what tools do I need?

Firstly, make sure you have a new oil filter and the necessary tools: a wrench, drain pan, and jack stands. Next, locate your oil filter, usually underneath the car near the oil pan. Use the wrench to loosen and remove the old filter, being careful not to drip oil on yourself or the car. Finally, install the new filter and tighten it by hand. Don't forget to dispose of the old filter in an environmentally-friendly manner.

Before starting any maintenance on your Audi A4, make sure the car is on a level surface and the engine is cool. Once you've located the oil filter, check for any cracks or leaks on it. It's also wise to replace the oil drain plug or gasket to prevent future leaks. Use a torque wrench to tighten the new filter to the manufacturer's specifications.