Have had battery gone dead twice. Once last fall, no idea if anything was left on.
2nd time was this past week, was inside with the accessories on, doing vag-com stuff, engine died after 5 mins, flashed a low voltage message, shut off, I did, would not restart.
Not sure of battery is covered under warranty in Canada, but will ask at next service. Battery to me looks kind of small for the vehicle, might be under powered, and the auto start stop might be rough on it.