Media box help ! S3 noob here..

[WayneCS3]

i picked up my audi s38p 2007 with audi nav plus today and am already looking online on how to add usb and bluetooth streaming. i have found this :

http://www.xcarlink.co.uk/product.php?productid=22&cat=4&page=1

anyone else use this? am i correct that it will work for my headunit , i think im right in guessing mines an RNSE ?.

Thanks