the true test will be seeing how these look in the middle of the day with the blazing sun right on them because audi's most likely use the expensive luxeon style leds which are suuuuuuuuper bright. they're so bright that when you see them, they're unmistakable.
it can be done but it will not be easy because in order to power and cool that many luxeon leds, you need some significant heatsinks on those leds. some guy on hid planet is doing something similar i think.
oh and you cant go wrong with lck-led.com thats where i got mine and to this day, they continue to work flawlessly.