How to Retrieve Serial Number for Porsche Becker Radio
Directions for how to get the serial code of the Becker w/out having to pull the radio.
Should work on CR-220 and CDR-220, etc. radios
Step 1. Turn on the radio and press the TONE button
Step 2. Simultaneously press the last and 2nd to last station selection buttons.
Step 3. Within 4 seconds, press the SEEK UP button until SERIAL # is reached.
Step 4. Press the button under the right arrow near the center of the radio. The serial number of the radio will be displayed. Continue pressing the SEEK UP button until END appears on the display. The radio will return to normal operation in approx. 5 seconds.