got my steering wheel controls to work with a alpine headunit. i got the adaptor from halfords. look for one that will fit the 3&5 series but make sure that you get the right one, theres 2 types, round pin and flat pin. then you need to find the adapter for your make of head unit. cost about £30Ive got a pioneer dvd unit and i hunted hi and low for an adapter that allowed me to use the steering controls with no joy. If you do get them working could you please let me know how.