I pulled the radio and a sticker on the top says "Original replacement part"(Becker radio). I looked at a VMI printout that I have and it shows the same code I am using. The VMI is based on the VIN so I assume the code I'm using is wrong since the radio has been replaced. So... I'll see if I can get the code from a forum member.
Dan

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2012 E350 Bluetech