Very seldom does Hertz.com reference those class codes. If you look at your booking it might be in there somewhere, and with the printouts when you pick the car up it will mention the class code, as will the keychain. But there's no list. The car descriptions only use the names of the classes, not the codes. Which is why stuff like this comes up here every so often.

Maybe one of those counter reps who just posted can get us a current list.