Since I keep referring to this thread, I'll update the following remark:

"So, I guess, the good news is there's a way to tell, but you have to open the box if you use my method, until I learn how Bosch identified their in-model revisions. "

The way to tell, learned by deduction and another 13 years of verification, is the label color. Bosch used a white label with black printing on those ECUs of the 5XX series where built with the upgraded hybrid.
--
Art Benstein near Baltimore

By all means marry. If you get a good wife, you'll be happy. If you get a bad one, you'll become a philosopher. Socrates