Hi. Have just put your serial number into a blaupunkt code calculator and it came back as: 1653. If its the wrong code then you still have another 9 tries to go before it gets locked so best bet would be to try Ebay from 99p if code does not work 1st time.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix in-car audio.