Steve Jobs decided he didn't like having a license plate, because he could be identified by it and it kept getting stolen. So he called up the Mercedes dealer and made a deal with them.
In CA it was legal to drive a car with no license plate for 30 days after you get it. So, once a month, they'd show up and replace his car with an identical new Mercedes, so he'd never have a car for more than 30 days and could effectively drive around forever with no license plate.