More pics and info here: http://www.leftlanenews.com/mercedes-benz-m-class.html
They mention the off road package for "certain markets." I'm going to guess and say probably not the US market. There's no such option on the current 2011 model but there is in the ROW.
Otherwise it looks great and with some really good improvements over the outgoing version. Porsche needs to offer an oil burner to round off its Cayenne portfolio. Then the choices in diesel will be complete in this segment (ML, X5, Cayenne.)
About the ML63, it was rumored to have been killed off with the 2011 model, but it survived. No word on the 2012 yet. But the question is whether it'll keep the 6.2 or go to the 5.5.