Its genuine. I phoned VW in Preston on spec, and they stuck her on the phone!
Sounds like a DPF issue. The car has been unused for about a month, and it sounds like she’s just been pootling about in it for a couple of days before driving home.
Genuine? That makes it *more* likely to be a scam.
1) She happens to work at the VW dealership that the car managed to limp to, despite a sob story about having been out of work.
2) She can therefore get her hand on any old diagnostics printout so support her story.
3) She can get the car fixed (if there even is an issue) at a vastly reduced price, maybe even free. Don’t tell me “homers” don’t happen.
4) It just so happens to be about the single most expensive “fault” the car can develop without actually involving any physical damage.
EDIT – I may be jumping to conclusions about her working there…