I have an October 2013 SEAT Leon 1.8TSi DSG FR 5-door hatch, and the rotary volume control on the lefthand side of the steering wheel has failed. The pushbutton (mute) function of this control still works, but the rotary volume function does nothing. Does anyone know if I can repair or replace this myself, or is it definitely a dealership job? It is difficult to see if it will just individually unclip and pull out, or if it means dismantling the steering wheel, which I don't want to risk, due to the airbag and other controls. Any advice would be very welcome.