It not that, this guy used Crossfire parts in his SLK230, its that DC used the SLK parts in the Crossfire. Other than the body, there ain't much new in the Crossfire, it's essentially left over MB parts and technology. The one difference between the SLK 230 and the crossfire, if you look at the MB photo just above the center vents, you see a cut-line in the dashboard, that's a dual cup-holder. Why this did not carry over to the Crossfire, I'll never know.