If the original car without AUX, you can drive your car to your local AUDI factory or service store, to install the AUX at first.
or additionally buy the AUX part from us directly.

Notice: This fiber box only applies For Audi A6L / Q7 2007~2011 we do that machine,

Other models are not Fit.

Hope it is clear to you.

https://www.aliexpress.com/store/product/For-Audi-A6L-2007-2011-Car-GPS-Nav-Navi-Navigation-Multimedia-Audi-Video-Touch-Screen-Control/1499240_32771544597.html

https://www.aliexpress.com/store/product/For-Audi-Q7-2006-2015-Car-GPS-Nav-Navi-Navigation-Multimedia-Audi-Video-Touch-Screen-Control/1499240_32771798202.html