Gamma NON bose turning on without code and Gamma Bose in "safe"

[200t]

Hi there.
Following with my Radio issues, is there anyway to completely decode a Gamma Radio?

I have a Gamma CC ( Non bose ) that can be turned on without entering any code ( I am talking about after disconnecting battery), so no code needed at all.

Now, I have gotten myself a Gamma Bose that needs a code but the problem is that I can even enter the code: "safe" will show up and there is no possibility on entering the code ( not even sure that I have the right code, but I have some connections at a local Audi dealer so than shouldn´t be that much of a problem).

So, how can the radio shows "safe" and depressing FM1 + AM just woudn´t do enything?
I have tried FM1 + DX although I think the Gamma Bose shouldd be letting to enter the code by depressing FM1 + AM but nothing happens, just "safe".

So, at this stage, is my radio shot? Is there any other trick to be able to enter the code?
Beyond this, how come by "normal" Gamma is "hard" decoded ( no code needed at all) ? Can this be done on any radio?
Can this be done by an electronic professional or somethng?

Will keep posting about the radio

Thanks
Cheers