Skywatcher, if "The Tonight Show Starring Johnny Carson" is acceptable as a series, I can think of a few other notable vehicles:

*Johnny had a Corvette, and in the very last "Tonight Show," he can be seen driving it to work.
*Johnny once had neighbor David Letterman's beaten up Chevy pickup truck hauled off his yard, and it turned up on Johnny's stage in Burbank. (One of the show's funniest moments ever.) Come to think of it, the tow truck might also be possible. And I think this clip may also have been reused as part of Johnny's last show, which is one of the most readibly available Carson shows.