Interesting thread, I found it by accident as Im trying to get the email option to work on my New A5, 2017 model. I have paid the £99 data option to allow wifi use of my phone or anybody else, not sure its that cost effective as it is only 10GB of data for 1 year, have already used 400mb in one day with my own phones normal data usage and some internet radio just to see how it works.
Using google have managed to get texts to read and send but just cant get the email to work, although have seen that Android seems to work but iPhones don't, I have an Iphone. Not overly bothered about getting emails in car but would be nice to have all functions working, as I say this is the only one that is left that doesn't work.
I found setting up the audi user management very hit and miss but can lock and unlock my car using the app and all the additional features, the only App one that I don't seem to get is the calendar function but suspect that is that Im not putting any destinations in, anybody who uses this function and can tell me what you need to do to benefit from the service then let me know, as it shows as been connected on my MMI App.
Oh and European access is £165.00 for 10Gb for 1 year.