How do you change the wiper blades on a 2007 Audi A4?

Since I do not see the 2007 Audi A4 in my aftermarket wiper reference books, I'm assuming has proprietary parts. Most likely you'll have to go to the dealer and buy the part. Ask the counter person if the replacement comes with instructions. If not ask if they will provide instructions. If its a good dealer, they will help you with instructions. They'll also do it for you, but most likely charge.