I have a 2006 Audi A4 quattro. I took the car to the dealership and they want me to change the rotors, as well. I only have 27000 miles on the car. Do the rotors have to be changed. The dealer does not resurface the rotors so they would rather change them out altogether. The dealer wants $760 for front brakes, front rotors, and changing the rear pads only. Is that too much, and should I get an estimate from a private shop, like firestone?