The car does have a speed warning, although not that great and can only be set once at that speed [unlike the Stilo].
Tinting is mid-black - not the standard factory fit! My dealership messed up on the order, and so they had to get a professional tinter in. Film, but really good, and a lot darker than normal.
As for the buzzing, maybe some other members will come up with an idea/solution. Out of interest, what Connect/Connect+ you got, and what version?