The Crossfire is really Benz in Chrysler badging. It is very common for the europeans to use larger solid rear rotors instead of smaller vented ones.
Ford uses solid rear rotors on the Expedition. I don't remember clearly, but it seems like the Exp[lerer as well. The rotors on the Expedition (and Lincoln Navagator as well) are very hard, much harder than anything else Ford is using. They are very hard to wear out and they can be difficult to machine as they chatter like hell and leave a hearingbone chatter pattern if turned too agresively.
If more rotors were made as hard, their would be a lot less rotor wear complaints.
