Thanks Paul, really useful links.
The Autofidelity product isn't made anymore, can't find a second hand one for love nor money.
I have gone the route of a small router, 4G Dongle connected via MMI port, but until I can get VCDS sorted and the correct inputs and applications enlivened, can't do much more.
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2013 A8 D4 4.2Tdi SE Exec Ice Silver
Front & Rear Comfort seats, Seat ventilation and Massage to Front and Rear outer seats, Valcona Leather, Extended leather, Deluxe 4 - Zone Automatic Air Conditioning inc. rear comfort armrest, Keyless Go, Soft close doors, Bose, Audi Side and Lane assist, Adaptive Cruise, High Beam assist, fixed bending LED headlights, Night Vision, Sunblinds to rear and sides