2016-17. Front Left. Lumbar support. SEAT BACK. w/leather. A knob on the side of the seat that is used to manually adjust the seat Lumbar position. Pad used for the lower portion of the seat back. Unit. Adjust handle. Adjuster. Lever. Seat Adjustment Knob. Seat Cushion. Included with: Order by application seat back assembly, Seat back assembly.