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go to a dealer - give them your VIN, and your registration that proves you're the owner of the car the unit is installed in - had no problem getting that code. For my newest car I just got, I'll go there on my next visit to get oil changed and ask for the code.
 

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Hi All,

Command is lock on my mercedes cla, i had changed the region from Japan to EU, can you help me on how to reset this error message?
Hi, I'm having the exact same problem after changing the region in the Engineering Menu. Did you find a solution for it?

Thanks.
 
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