If you use the B every day, there should be no problem.
But for many of us, that's not always the case and the resultant problem, because the car was parked for a while in a humid environment, is there.
I would love to see a metal analysis of the rear disks compared to the Audi which is subjected to similar parking times(and longer), but with little rust.
I hate the idea of changing my driving style because of this rust.
