Sedans are distinct from other body styles by having two full-access rows for seating, and some form of cargo space at the rear accessible by a trunk. Sedans can vary in size, length and volume, but for a car to be called a sedan it generally means four doors, engine in the front, trunk in the back. Sedans are distinct from wagons, which also have four doors, but which have an optional third row for seating accessible via a liftgate or tailgate.