That's funny... 2015 models had a problem with the grille popping out on it's own. Looks like they fixed it for 2016.
Anyways- here's a thread that shows the tabs holding the grille in place. It should give you a clear idea of what you're working with...
http://www.focusst.org/forum/focus-st-discussions/41546-easy-fix-2015-grille-issue-pics.html
Anyways- here's a thread that shows the tabs holding the grille in place. It should give you a clear idea of what you're working with...
http://www.focusst.org/forum/focus-st-discussions/41546-easy-fix-2015-grille-issue-pics.html