Buy 2015 Audi A8 4.0L V8 A/T Quattro Base Sedan Seat Lumbar Switch. FRONT SEAT, w/standard seats, gray FRONT, Power, Seats - OEM Audi Part # 4H0959777BBC5 (4H0-959-777-B-BC5, 4H0-959-777-BBC5, 4H0959777B BC5)

Seat Lumbar Switch.
Switch used for the adjustment of the Seat Lumbar.

Seat Lumbar Switch

Fits A8, S8

FRONT SEAT, w/standard seats, gray.
Power Lumbar Switch - Repair or Replace
If your power lumbar doesn't move, your power lumbar switch may be the culprit. Have a technician inspect your 2015 Audi A8 to see if your the switch needs to be replaced.