Hi Rob, first remove the radio the serial number will be engraved on the right side and also on stickers on the unit it will be something like (M654321) (you might be lucky and find the code written on the unit)when you find this re-post your question and you should get the four digit code to enter the code eg 4321 press button1 untill 4 is shown then button2 untill 3 is shown and so on then press button 5 to enter
nigel, February 2008
