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@cmw, really appreciate you explaining it all. It makes a huge difference to be armed with knowledge.Yes, "virginized" is perhaps Mauser's term and means the same as "flashed". Software reprogrammed to the original pre-installed state - ready to automatically accept and store the first three RF keys presented.
To expand a little, "flashing" can be accomplished in a few ways - all of them involve rewriting data stored on a EEPROM in the ECU.
All the information can be completely rewritten, or just the key data can be selectively edited.
Either can be done with the chip still mounted on the ECU board or with the chip removed and then replaced. Depends on skills/preferences + tools available.
After realizing I had NO master I spent a couple of weeks preparing to rewrite my own -reading and buying some tools- and then found one of Mauser's generous offers.
When the locksmith tech calls in the morning I'll make sure he's ready to do a clean flash and has two or three keys to bring with him. Thank you!