Upon entering the serial number, the tool uses an algorithm to generate the specific unlock code for the user's Blaupunkt RCD 300 radio.
You can often find it on a sticker on the side or back of the unit, requiring you to remove the radio from the dashboard. Some models allow you to view it on-screen by holding buttons 1 and 6 simultaneously. Generation Methods: rcd 300 code calculator blaupunkt 1 13