A vehicle includes a vehicle seat comprising a seat base structure and a seat back structure pivotally connected to the seat base structure. The seat back structure includes a central adjustable region, an inboard side adjustable region adjacent the central adjustable region and a outboard side adjustable region located adjacent the central adjustable region. The seat back structure includes a central proximity sensor located at the central adjustable region, an inboard side proximity sensor located at the inboard side adjustable region and an outboard side proximity sensor located at the outboard side adjustable region. A seat back structure adjustment apparatus includes a central region adjustable member that adjusts a configuration of the central adjustable region, an inboard side adjustable member that adjusts a configuration of the inboard side adjustable region and an outboard side adjustable member that adjusts a configuration of the outboard adjustable region.