: On some RCD 300 models, you can display the serial number by pressing and holding buttons 1 and 6 simultaneously for several seconds.
If you've lost your original radio card, a is the primary tool used to retrieve this PIN using only the unit's serial number. How to Find Your RCD 300 Serial Number rcd 300 code calculator blaupunkt 1 new
RCD 300 Code Calculator for Blaupunkt: A Guide to Unlocking Your VW Radio : On some RCD 300 models, you can
: The most reliable method is removing the radio from the dashboard. The serial number is printed on a sticker or engraved into the metal casing on the side or back of the unit. : On some RCD 300 models