I've needed VW Roadside Assist twice

I just rang their number (it's on a sticker on the window, and also they give you a card with the number), described the problem (oil in the coolant, plus drastic messages on the MFD), and after some discussion (and an hour or so of waiting) a flat-top truck appeared and took my van away to the dealers where they fixed it for me (under warranty). They dropped me off at my home.