You hold down the on button for more then 30 seconds, not sure if the radio or ignition has to be switched on though?
And for those in Europe with Ford car problems Ford did release a firmware update for the car audio systems last month, I tried it though and it hasn't fixed my problem but I am yet to fully reset my radio which I am going to do when I get round to it.
Ford firmware update webpage:
Did you ever get this sorted?
I have just bought a Ford Ka 2010 model and my iphone 4 works fine with the bluetooth for the phone but neither bluetooth or the usb connection recognise the phone as a player - so I cannot play any music at all through the phone. I'm still on ios 5.1.1.
I understand the Ford update is no good for the New Ka as the latter is Fiat 500 based and it's their BT technology. I guess we will have to wait for Fiat to supply an update.
Has anyone managed to sort out this issue?