Hey rbob! I hope you were able to find some answers to this - but you can take a look here for a little bit of information about ordering SyncUP and the current costs (it's a deal!): T-Mobile Sync Up Drive. Basically, you'd add a line for the SyncUP - not a voice line, but a mobile internet line - and then you'd chose how much data you want, which would dictate your price. You can order online, over the phone, or in your local store - though it might not hurt to give them a call first to check availability. I'd also recommend a compatibility check, if you haven't done one already!
Thanks. Mobile device (not a phone) line makes obvious sense, which is why I couldn't figure it out
Car's compatible, but because VW has been playing games with the names it uses for US models, I'm going to have to ask the dealer where the socket is.
Even without the mobile hotspot feature, it looks like a really useful driving accessory.