Didn't "Build 2" start in about August 2013? That may be why yours is missing this function. Mine built Jan 2013 has the rear door sensors.
I've been wondering when "Job 2" started. I saw it stated elsewhere, though not from an official source, that the 2013 C-Max was built until Dec 2013; I found this after it was suggested my build date, as shown on etis.ford.com, was after they stopped building the 2013s. With Adrian reporting his build date was Nov 2013, that would support 2013 production ending in December -- but the lack of sensors on the rear door handles suggests that it was a Job 2 build.