Just traded my Xfire for a MB SLK 350 last Sunday, so this still fresh for me.-- I agree with those who say that the Xfire is neither a Chrysler or a MB, the Xfire is unique! and that's why it is such a special car. The looks, the comments, and the fact that you have a car that looks like no other, plus you do not see many Xfires on the streets.
I have to agree that the MB is superior. Interior is way more on the luxury side and the engine of the SLK 350 might kick the xfire's butt (not the SRT!)
Withntht said, I miss my Xfire but love my SLK already.
Don't forget Crossfires are beautiful and UNIQUE!!!