Hello guys, I have to say this is a huge work that wasnt necesary to be done.
Im sorry to post this but I also changed the bulbs without removing any piece except wheels and wheelcover.
Thats all you need to remove to change the xenon lamps
Here its the topic on a spanish forum, Actually its mine but images should explain it a bit better in combination with the video.
Sorry OP for the long process you went through
http://www.audisport-iberica.com/foro/topic/358897-tutorial-cambio-bombillas-xenon/
Hope it helps someone