2016 Audi A6 Brakes

At high speeds (around 65 or more), when I apply the brakes I can sense some vibration in the brakes. I mentioned to the dealer that the brakes are not smooth as in my other cars. I was told, it is because Audi is a "performance car." Now I know that it is just poorly built.

THE VEHICLE VIBRATES HEAVILY WHEN THE BRAKES ARE APPLIED AT HIGHWAY SPEEDS. BRAKES ROTORS REPLACED WITH LESS THAN 15K MILES VEHICLE APPEAR TO HAVE THE SAME ISSUE AND HAS CONFIRMS BY AUDI DEALER BUT REFUSED TO ADDRESS THE SAFETY ISSUES... ROTORS REPLACED AT 25K MILES AND VEHICLE NOW HAS 40K MILES AND NEED ROTORS REPLACE AGAIN

THE VEHICLE VIBRATES HEAVILY WHEN THE BRAKES ARE APPLIED AT HIGHWAY SPEEDS. NO ACCIDENT HAS OCCURRED BUT IS OF GREAT CONCERN