Among the many things Steve Jobs was famous for - was that his Mercedes SL55 AMG never had license plates. Apparently Steve found a perfectly legal loophole in California law letting him getaway with this.
"Steve (or someone close to him) spotted a loophole in the California vehicle laws. Anyone with a brand new car had a maximum of six months to affix the issued number plate to the vehicle.
So Jobs made an arrangement with the leasing company; he would always change cars during the sixth month of the lease, exchanging one silver Mercedes SL55 AMG for another identical one. At no time would he ever be in a car as old as six months; and thus there was no legal requirement to have the number plates fitted.
One might also assume that the leasing company was happy - they had an endless supply of luxury cars to on-sell with the previous driver being none-other that Steve Jobs.
That would be a win-win-win situation for Steve, the leasing company and for the subsequent buyer."