I have just purchased on e.bay a cd/radio to replace my peugeot 206 cassette radio. It beeps contimuously. My new cd/radio is out of the same model (206 -2003 year)
Your 206 radio needs to be configured to your car. You will need to get your Peugeot dealer to connect their diagnostic equipment to enter the vehicle VIN number into the radio, this will stop it bleeping. The should be able to do this within half an hour.