Only just seen this. I'm really not sure how to link another thread/post I have put on here previously about the same fault. But!
If your local ford dealer or the direct approach to ford doesn't offer up any financial assistance or the BMAX is too old, then having had my centre console to bits and almost self diagnosed the fault to perfection. Had I not got a 50% discount on the part and fitting, I would have just made sure I got the exact part number of the "Stereo" and this is because it all depends on the extras that are fitted t the car, i.e sat nav, reverse camera or front sensors. But the "Stereo" control units are available on a well known internet selling site.