MerlintheMad
10000 Posts Club!
Things mentioned already pretty much cover everything that has happened to more than one Stinger owner. Even so, they are super rare to pretty rare. Paint imperfections is one of the more common, rare things; as are rough/juddery brakes and a noise from the hatch. The brakes and hatch "rattle" (thump/clunk) are the easiest to fix. Most moonroof noises manifest later, and are still not common (based on the actual lack of complaints per number of cars sold so far). I'd say don't borrow trouble that isn't there. And look the car over carefully for visible stuff. The test drive should be nice and quiet. If it's not, mention what you hear and ask to test drive more than one car for comparison. (All this I offer because of reading others' experiences over the last year and a half plus; I got my GT1 sight unseen and drove off in it; and it's as trouble free as a car can be over the last c. 23 months.)