How do you put code into Renault car radio?

To input the code into a Renault car radio, first, turn on the ignition and the radio. If the radio displays a "CODE" message, use the preset buttons (1-4) to enter the code. Press the button corresponding to each digit of the code in sequence, then press and hold the button for a few seconds to confirm the entry. If entered correctly, the radio will unlock and resume normal operation.