Sony Code

I have Car Stereo  Sony XR-M510, yesterday I changed the battery in my Car.

Now my Car Stereo  Sony XR-M510 is displaying "Code in" on checking the manual it states that details of the security code buttons would be supplied separately, it seems like I have misplaced this information.

Can anybody assist me on how I can obtain this security code for my Car Stereo  Sony XR-M510  ?
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☠ MASQ ☠Commented:
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PetersennikAuthor Commented:
The Code for my particular Sony was not correct, but the method of de-coding was correct.
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