Just picked up my new Audi A6 (B9) - any settings or tips I should know about?

I recently purchased a brand new Audi A6 (B9) and I'm excited to dive deeper into its features. I've gone through the owner's manual but was wondering if there are any specific settings or tips that seasoned owners would recommend to get the most out of my vehicle, particularly in terms of comfort, infotainment, and performance.