Need unlock code for Blaupunkt car radio - can anybody help?

The code is for a Fiat Punto Low RHD, Blaupunkt cassette/radio.

BP Nr. 7 649 373 316
Prod Nr. Fiat 735 282 261
BP9373Y5977131

The radio & the interior light went off in the car due to a blown fuse. I've tried several programmes which have given me the code 3607 or 1607, the problem is the preset numbers are 1-6 and are not dual functioned. Can anybody help me?