My recently purchased S3 cab has an annoying issue. The rear brakes keep sticking when it’s been parked overnight in the garage after its been out in the wet. Obviously this could be due to a small about of corrosion happening, but I’m surprised that this can occur so frequently, and over a relatively short time after being driven- none of my other cars (non-Audi) have done this? Has anyone else had/is having this? The dealership have kind of fobbed it off, saying it needs a software upgrade which they’re waiting for?!