This from Josh Boyajian:

Here is a shot of the new 16th Battalion buggy.
Here’s a list of the four I can account for. There are at least 10 new ones but only a few are in service. They are all 2014 Ford Explorer Police utilities.
Battalion 9 – B-577
Battalion 16 – B-579
Battalion 17 – B-580
Battalion 24 – B-584
Ford Explorer for Chicago Fire Department

New buggy for CFD Battalion 16 with Shop ID #B-579. Josh Boyajian photo