This perk of Hertz President for FB Platinum was never an official perk, and to my best knowledge it stil isn’t. So I’m afraid that you can’t claim a right to it. You could call Hertz and threaten to vote with your feet (never rent with them again). Depending on your rental frequency they might find it worthwhile to propose something, or not....

I’m kind of done with Hertz anyway. Relatively too expensive, and the tiny Frequent Flyer benefits are minuscule and not worth it. I also never really experienced a lot of difference between Presidents Circle and Five Star.

Much more benefit can be had by comparing car rental prices of different car rental companies in a given location, with the use of one of the renown car rental comparison sites. Price differences are often huge. Often you will find your dream car by paying less in the first place, without the need to count on an upgrade.