Hello, first of all, thank you for excusing my English I am French and my English is rather bad. I have just bought an second-hand alfa romeo 156 sw 2.4 jtd on 2002. after the change of the battery the car radio asks me for a 4 numbers code. I have no documentation of origin of the car radio. Could you help me? Thank you in advance. there is the informations present on the car radio. Blaupunkt-werke gmbh made in portugal. 815 BP037822575455 ALFA 156 HIGH CD 7640378316 [e1] 021613 ENGRAVED ON THE STEEL 8 635 123 208.2 BP-Nr. 7640378316 Prod. Num. Fiat. 156 034 209 A151