Actually, the fact that you can't get a posi unit turned me against spending the extra bucks for an SRT6. I would think you could probably get a posi somewhere but I don't know enough about Mercedes to find out where or how.

The XF is fun to look at and fun to drive. I even like the way it hits a chuck hole - solid if you know what I mean. The darn thing rides smooth for a small car. I think I will continue to race and modify the Vette and just enjoy XF as it is. But, my mind changes like the wind!