Your vehicle may have power lumbar and side bolsters. The switches are located on the outboard side of the seat cushion.
Use the power seat control to move the seat to the proper position. See Six-Way Power Seats .
Use the vertical lumbar switch (A) to adjust support in the seatback. Press the switch forward to increase support. Press the switch rearward to decrease support.
Use the horizontal switch (B) to adjust the side bolsters. Pull up the switch to move the wings of the seatback in closer to your body. Push down the switch to move the wings away from your body.
Keep in mind that as your seating position changes, as it may during long trips, so should the position of your lumbar support. Adjust the seat as needed.