You need a serial number to get the code to unlock the radio. Hold the 1 and 6 button to get your serial number, it should start with an M or a V followed by 6 or 7 digits. If this isn't what is ...

If LOCK13 appears then you will need to take the radio to a Ford Dealer or garage to be unlocked. It means you've entered the wrong code too many times so you won't be able to unlock it yourself ...