Car 2003 (F)?

I have a problem with the radio. The display shows the error "7 safe". I'm interested in how to remove a mistake because I was thrice entered the wrong code, and whether someone can find the code for radio:
Blaupunk CAR 2003 (F)
NO.: 09,115,095
7649200321
GM020328293104

I'd be very grateful if someone can help me!