How do I replace the battery on my Audi A6?

I noticed that my Audi A6 is having trouble starting and suspect it's due to a faulty battery. How can I replace the battery on my car and ensure smooth performance?

To replace the battery on your Audi A6, first park your car on a flat surface and turn off the engine. Locate the battery in the engine bay and remove the negative terminal first followed by the positive terminal. Then, remove the battery hold down clamp and carefully lift out the old battery. Make sure the new battery is the same size as the old one and install it securely in place. Finally, reconnect the positive terminal followed by the negative terminal. It's also a good idea to have your battery tested once a year to ensure it's working properly.