How do you enter the radio code for a vauxhall vectra 2.2 52 reg?

To enter the radio code for a Vauxhall Vectra 2.2 (52 reg), first turn on the ignition and switch on the radio. The display should prompt you for the code, usually showing "CODE" or "0000." Use the radio preset buttons to input the code, pressing each button corresponding to the digits of the code. After entering the correct code, the radio should unlock and start functioning normally.