Keyless Entry, Keyless Go and "A7" key on A8 D2

[notorious]

First of, it'd be great to know what the kit is. The guy has posted this on one of German forums, everyone got excited, but he didn't provide any sort of description/explanation.

It seems for me the core kit is non-VAG (including the start-stop button). That 3rd partly kit can recognise genuine Audi key with keyless feature. The kit is integrated with standard A8 D2 central lock (this is easy part).

I think Audi standard immobiliser is disabled (i.e. immobiliser capsule was removed from old key and glued somewhere close to immobiliser antenna, so that instrument cluster always thinks the key is in ignition).