Audi now does Nav updates OTA (not on my 2016 however) so I would think also VW.
Typically you do not need any other service (e.g. Car Net) to use Nav directly, however "points of interest", etc. are usually gained via Car Net. There is usually a "free" period of use for Car Net and also a free number of Nav updates.
You're asking very good questions but we in the USA simply don't as yet know a lot of these details. But FE delivery is not that far off so we should soon. Please stand by.
