Armrests are more prolific in larger, more expensive models of cars.
In the front of the car, a central armrest, which commonly folds away based on user preference, will also often include a storage compartment and sometimes even cup holders. Some also provide the location for controls for non-essential functions of the vehicle, such as climate control or window motors.
A rear arm-rest will typically fold away between the back seats, to allow for the central (third) seating place to be used. In some designs where occupant safety is emphasised, including some Volvo models, the armrest doubles as a child seat, complete with specially adjustable seatbelt. As with the front, it is not unusual to have armrests built into rear doors, or the side of the car if there is no rear door.
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