Hi, Want to upgrade my single-slot radio to the sat nav unit, which I know involves a bit of work. Going to pay to have someone do it for me though as I don't trust myself with my car!! One question though - if I upgrade to the latest Sat Nav unit, can I get some kind of Audi DAB receiver in there too? And an AUX socket so I can plug my phone in? (Not an iPhone). Cheers.