I could tell mine was going I've been listening to it for 3 x months. If it starts rough with a few seconds of rattle then its likely starting to go. Mine never did this then ironically after I started reading about it, it started doing it.
But only after its been sat a while so say if you popped into a shop to grab something and then started it would start smoothly, if that makes sense.
If these syptems start then I would advise calling VWCC logging it then arrange for a new one. From what I've read even the revised ones can fail.
Alternatively perhaps extended warranty isn't a bad idea ....