I love that people are asking about the Cd of new vehicles (even if it's "just" an ecomodder member").
Eventually, more members of the general public will learn/understand about the impact of drag on efficiency and start asking about it. That'll ratchet up the competition among automakers to out-do each other. We're already starting to see that, and not just in the "eco" category.
To answer your question...
Seems like the stock Fiesta 2-door has an unimpressive
Cd of .33 . The European "Econetic" version improves on that, but the figure isn't given. Source:
Ford Fiesta ECOnetic (2009) with pictures and wallpapers