Im gonna go with the part at the Chrysler dealership. 35 dollars is cheap enough and I doubt there are different versions of this limiter switch for a crossfire. I guessed the price would be much higher since its basically all Mercedes.

This is good news for me as this is what made me register here in the first place. This post is the only one ive found on this specific issue. Keep me updated if you do something and ill do the same. Thanks!