Has anyone had any corrosion on the trim that goes around the windows? I know the trim used to go milky on chrome versions but mine is a black edition so this trim is painted black from factory. There is a very small patch (I'm being fussy but it's likely that the corrosion will spread) which has bubbled on the trim around the rearmost window. I've attached a pic...although not the best. The car is MY 2017, do you think Audi would replace/repair this under warranty?