The Porsche Panamera has been available since late 2009, and although in 2011 received some new features (mainly the emergence of the diesel version and new items of equipment), rumored to be later this year could receive a facelift.
Apparently this update would be some cosmetic changes, which affect mainly the headlight design, and mechanical, which would basically a tune-level suspension.
However, while these developments might be interesting, what is grabbing everyone's attention is the possibility that a new future models could be available in two body new.
Specifically, it appears that the new model could be available with convertible body and extended battle, plus a fourth that would be defined, although some describe shooting brake. Of course all these are just rumors, so you still have to wait a while to see if they come true or not.