An adjustment device for the automatic seat position change in a vehicle from an actual setting into a predefinable target setting including an electronic control unit for automatically setting at least one actuator for adjusting at least one seat-position-dependent adjustable vehicle component depending on detected vehicle occupant data. In this case, the control unit has an analysis unit for determining an efficiency-oriented adjustment space requirement for the adjustment of the actual setting into the target setting depending on the vehicle occupant data and the vehicle interior geometry.