Mine goes in tonight for same problems.
Though mine only stops working when its really cold and the car is iced up, which is a bit of a problem when you have the climate windscreen, and can't turn it on, as it's operated through media screen, so a total waste of money so far, in the last year the car has been frozen no more than half a dozen times, and each time I've been unable to use the climate windscreen !
If was to spec the car again, I'd ditch the nav pro, climate windscreen and advanced phone prep - which again is a total waste of time.