Originally Posted by baliktad

- 1-car class upgrade: Don't fall for this! This is bait-and-switch at its finest. Hertz wants you to think that this means you will get the next booking class (economy -> compact, or standard -> full size). In practice, Hertz has subdivided each available booking class into "normal" and "upgraded" sub-classes. So when you reserve a compact (B class), your upgrade is not to an intermediate (C class) car, but rather to an "upgraded compact" (YB class). This means it's still a compact car, but with something slightly nicer inside like upgraded trim, a sunroof, or better upholstery. Since these upgraded subclasses of cars are not bookable, I consider this outright false advertising. Don't go for 5* thinking it will get you a bigger or noticeably nicer car; it won't.