Anything Audi can do to 'protect' their IPR only requires time and the correct codes from somewhere to be opened up to the aftermarket.
I'm pretty sure there are EU Directives that require Audi to make the information available, but they may make a fuss about it or change their backoffice systems to make it as difficult as possible if you don't have Audi's own diagnostic equipment at a suitable mark up.
Not really an answer as I don't know the ins and outs of it but aware of how it is supposed to operate.....
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===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD===
2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus
2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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