I have an RS5 with brake problems
 

I don't drive it hard or on hills and at 4,600 miles they said that I needed new front rotors and pads. So those were replaced. Now at 17,000 miles they say I need front rotor and pads replaced again and rear rotors and pads. I actually purchased a brake warranty but they say it only covers pads and the cost for the rotors are $3,300. I find this outrageous and believe the car is a lemon at least so far as the brakes. What do you think?