Ok I am not up to date on this whole thing so all i need all the help I can get. I have the RSNE itself. I work for audi and replaced it because one of the buttons was wearing off. I have an 01' A6 4.2. I have no harness. First question where do i get the harness. Second question (remember i dont know all of these terms) I want bluetooth what is needed to make that work. So, how do i get my rsne to work in my a6. Any help would be great.