The comment-o-sphere is crying "hoax," but the experts say it's possible. He may have organ damage though.
The police thinks he's likely to tell the truth. No tracks were visible outside the vehicle, which was covered by undisturbed snow. He also hasn't been seen anywhere else over the last two months
He also has done similar disapperance acts before when things got too though for him.
No doubt the skepticism is fuelled by the fact that he was only a couple of kilometers from the main road. Seems a bit odd.
There are reports that he was unemployed, living out of his car, and dodging debt collectors. Maybe that explains why he did not immediately walk out.
I don't think there will be more reports that will shed more light into this incident. Apart from the hibernation part it's just a story about someone's grey every day struggle. Most likely he has some kind of luggage that he really should receive help for.