Once a year for an oil change and the tires last 50, 000 miles.
My Audi q5 was bought new in 1911 and was initially used by my wife. She loved this car but after 3 years she decided to lease a Mercedes and change every 3 years. So I sold my SUV and made the Audi my car and it is the best vehicle I have owned in the 75 years of my life. I like to smooth ride and quick acceleration and the leather seats. And it is not a gas hog. This 2011 vehicle now has only 50, 000 miles on it. I have never had any major problem with it and just change the oil once yearly at my local mechanic. I have only changed the tires on my Audi once in its 50, 000 miles! Great car and when it has 100, 000 miles I will buy another.