Sidez, if it came off of an SLK, then it should fit in the Crossfire with out a problem. As a matter of fact, I do believe there use to be a photo of one in the gallery. Didn't Russo have one?
As for wearing a seatbelt, that's one of the nice things about living in America, you're free to do what ever you want...Oh wait a minute, that's the way it use to be. Sorry, I was having a flashback.