I'll guess only a very few will be using omniscan, pretty much standard on here to be using vagcom, if you doing everything BY THE LETTER, and it's still not working then I'd try getting hold of someone's VCDS first before going any further.
My car didn't do anything on the function test iirc and I can't remember what I did to make it work I think it just started working after messing around a bit, and make sure you cycle the EPB before starting the procedure.
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