I have a 2004 a4 avant,it was originally equipped with Sirius radio,the guy I bout it from put a Eclipse avn726e navigation head unit in,I bought a compatible Sirius tuner for it,my question is can I tap into the existing Sirius tuner that is in the car "antenna power ect." Gonna take the old one out,before I take it apart was wondering if I needed any antenna or any other adapters or if there is an easy way that someone has already Don,any help would be great
Y appreciated thanks