the only thing that the Crossfire needs (what i think) is:

the 3.5 from the SLK 2nd gen
more than 270HP
same weight
Limitied slip differential
no more goddamn ball steering, has to be rack and pinion.

if the Crossfire has that, then i would love it to death (course the interior could use alittle work, like no plastic *****, should be brushed alumnimum)