I just bought an 98 opel astra 1.4 but the radio doesnt work. Its a blaupunkt 300. It always had SAFE on the display but today I turned it on while holding the AS button and 7-safe mode came on. Whats the difference and how do I fix it. I took the radio out and found a number - 1704. Is this the code? S/N is GM1300V4071148. xj58m.

opel astra g radio code 7 safe