How do I change the automatic transmission fluid in an Audi A8?

I've noticed that my Audi A8's automatic transmission is not shifting as smoothly as it used to. I want to change the automatic transmission fluid, but I'm not sure where to start. Can someone provide me with step-by-step instructions?

First, park your car on a level surface and engage the parking brake. Locate the transmission fluid dipstick, which is usually near the back of the engine compartment. Use a funnel to add new transmission fluid to the same hole where you pulled out the dipstick.

Alternatively, you can do a transmission fluid flush by using a machine to completely replace the old fluid with new fluid. This method is more thorough, but it may be better to take your car to a professional for this service.