Turn on the radio and the display will show 'CODE'

Use the steering controls for code entry.

Press the [ ¬ ] button then rotate the thumb wheel for the correct first digit
Press the [ ¬ ] button then rotate the thumb wheel for the correct second digit
Press the [ ¬ ] button then rotate the thumb wheel for the correct third digit
Press the [ ¬ ] button then rotate the thumb wheel for the correct fourth digit

If the correct code is now shown on screen, press and hold the [ ¬ [ button for up to 3 seconds to store the code

Or for the DC449/64L Models

Switch on the radio, the display will show 'CODE'

Press [ 1 ] followed by the station < > buttons to rotate the first digit
Press [ 2 ] followed by the station < > buttons to rotate the second digit
Press [ 3 ] followed by the station < > buttons to rotate the third digit
Press [ 4 ] followed by the station < > buttons to rotate the fourth digit

Finally if the correct code is shown on screen press the [ 1 ] button to save the code.