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Any idea? Thanks!
Take the DVD out and read the DVD version info. You would not find the exact SW revision number for the Navi processor firmware but there would be a one-to-one relation between the two (which means there is no need to worry about the SW unless you have an old one and a bit later but still an old map DVD that does not load over the very old firmware).

Or are you actually referring to the head unit (Comand) firmware? Can't you read it from the engineering menu? If not, then with Star diagnosis.
 

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Discussion Starter · #3 ·
I mean the head unit. I think the engineering mode in the facelifted W211 is locked from the owner. What is the Star diagnosis?
 
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