E, are you referring to the black car that Tony used to drive out of Tennessee?
If that's the one, yeah, I missed how that came about too. But then I only watched IM3 once thus far. I'll catch the movie again this weekend, let's see if I can figure it out Most likely it's a stupid convenience plot point though Or maybe Tony is loaded so he already rented the car for use later, and the movie just brushed over it.