Are you in SDS simulation mode?

Ill try to find out for you how to change the coding.

On my C36 we had a custom code provided by Beckman, but we did NOT have to send out the ME to unlock it. I have not coded a C43 ME to 5.4 spec, though I know several master techs @MB that have including one who was a shop foreman (and was his own car) it's was a simple task