It is a Guide. They have lots of cars in almost every category, and as such is an indication of the sort of car you might get, but very likely won't. Sometimes it reflects the car that they have most of, but as fleets vary from location to location then unless it is a "make/models guaranteed" class, you should not set much in store by whichever car they happen to choose.

In recent times they've had Grand Cherokees and 4Runners, but you were probably more likely to get a Dodge Journey or a Hyundai Santa Fe.