cross traffic alert

noticed in my 17 gt that when the cta alerts it is extremely loud. Is there a way to lower the alert volume besides disabling it in the menu? I find there feature useful just don’t need it blaring at me when it goes off.

Is it possible to add the OEM Ford BLIS (Blind Spot Detection) and Cross Traffic Alert features you can get with the 2016 Mustang as a paid option, but as an add-on after the fact somehow? I have not found any articles saying it's possible to add to a 2016 GT Premium if it didn't already come...