Optus Prime: I'm worried that I might not have given you all of the information regarding your question above!
I've just been helping a friend with an aerial problem on his 2015 Polo. It has the second generation MIB infotainment unit. After much fiddling and even more research, it appears that some of these vehicles do in fact have a diversified aerial set-up as an option (that uses the rear window as well as the roof aerial).
The identifying feature for the Polo of the diversified aerial set-up is the presence of 6 x speakers (the normal option has 4 x speakers). Not sure if this topology also happens in the newer mk7s that also have an MIBII unit. Anyhow, here's a bit about what happens in the Polo
Cheers
Don
