Your radio has no code, and no way of entering one.
Is this the head unit that has come out of your car? If so it will always work in your car, but no other.
The head unit is linked to the car's security system.
A Saab Service garage can move it from car to car by "divorcing" it from your car and "marrying" to another.
If you have bought a head unit that has not been divorced from the original car, you have a problem. An undivorced unit is a doorstop.