Some random Job 1 2012 Focus cars had the active grille shutter system that were not SFE models, it seemed to be more prevelent in cold weather or california emissions states prior to Job 2.
All Job 2 2012 Focus models and all Job 1 2013 Focus models were supposed to be built with the kysor shutter system.
I doubt that it's making that rattling noise though.
For reference Job 1 2012 was from late 2010 (serial production for retail around March 2011) through 3/4/12. Job 2 builds started 3/5/12 but were not really fully job 2 builds (i.e. many were missing the four way head restraints until around the week of 4/10/12) through 7/22/12 which was the end of 2012 production. Job 1 for 2013 started 7/23/12 and is still currently going on.