Swissian
Why do you say that?
It's in the Parkers article linked above:
"So much mobile data transfer is possible in this van, in fact, that VW has had to incorporate some very powerful antennas into the vehicle – which explains the unusual black carbuncle you may have spotted at the top of the windscreen. An effort has been made to minimise the increase in vehicle height but you can see that it does still stand slightly proud of the roof."