Unless the brake pad wear light is on you really do not need new brakes yet.
Even when the light comes on there is a large built-in safety margin for you to organise the fitting of new brakes.
And when it does come on, the first thing you do is get your mechanic to check out whether it is the front brakes that need doing, or the rear brakes, or - possibly - all four corners and order parts accordingly.
It is a great shame that an untrustworthy mechanic has lied to you about unnecessary work on your car and compounded his lie by stupidly telling you the brakes will fail - they won't.
Some people may tell you their personal preferences for brakes but I strongly recommend that you purchase what the car was originally supplied with by VW when new and that's PAGID brake pads and Brembo rotors.
Spiegelglatt has put up a very good post but you may wish to take an easier route.
There is a member on this site who can provide the complete full set of brake parts as fitted by the factory to your car.
He offers good service and good prices and quite a few people have been very happy with his service.
He sends the complete kit straight to your chosen workshop for you [and as it's very heavy, this is sensible].
Look up QPower1 in the Brakes section and either send him a private message or give him a call.
He will gladly talk the whole thing through with you so you don't need to worry about not having any technical knowledge as, unlike some, he won't take advantage of you!
Here's the link to his main thread:
http://www.clubtouareg.com/forums/f...tors-pads-hardware-and-sensors-now-11903.html