inputs.text: partly functional unit horrible support witson - purchased directly witson alibaba half price witson not not provide documentation installation unit unit works great minus loss steering wheel controls bmw losing fiber optic loop ha e professional series head unit 2006 bmw e91 bmw sos error dash install youll need pay thr dealer rehemove code state steering wheel controls retained not due equipment not capable bus support shipped itehem week purchased itehem provided no support except tell watch youtube videos unrelated issues head unit