I have a customer's car today and he was wondering what the hanging wire end is for in the front bumper opening. I can put pix up if necessary. Looks like it has a fake sensor clipped into it and its just chillin underneath the grill in the bumper cover opening.
Seen pictures of a temperature sensor looking thing under the bumper on the new 5.0 ... probably the same thing on the car you're looking at, but missing whatever package has a use for ambient air temperature. If I had to guess, comfort package probably adds an external air temperature display somewhere.