Controlling head rest according to vehicle occupant size

A vehicle seat and a seat headrest (34) are adjustable to accommodate vehicle occupants of varying heights. The headrest, height and seat position are adjusted together by connecting the headrest drive motor and the seat drive motor to a single control switch (48). The headrest has a smaller total distance of travel in relation to the travel distance of the vehicle seat. The headrest motor (44) may drive a screw with a smaller pitch. Alternatively, there may be employed pulse width modulation of the electrical power supplied by the common switch or other means to create a proportional relationship between the motion of the headrest and the vehicle seat.