Interesting; I found this to be a problem with the Aygo too. Was especially bad because of the pattern on it, really hurt visibility when the sun was at certain angles. I ended up laying a black dishtowel over it!
The repair bulletin has just been published today for those of you with a 12v battery issue call your dealer and quote bulletin ref BE-0069T-0514 and you will get your car reflashed with updated software.
So a five year old Auris has had the same issue twice in 55,000 miles, it has restarted after a wait of approx 10 minutes (presumably having cooled down), and not needed to have any repairs done. And you're saying it is not fit for purpose?? Think a dose of realism is needed here ...