Thanks for all the feedback, I appreciate it. Here is the latest:
I followed up with the SA today about my concern that G2 was not used. It seems that G2 was not used because the front diff was not done as part of the service, only the rear - and for that they used G4. He said they do what is specified by their system when they scan the car key and their system told them to do the rear. Whether that is the truth or not, I have no way to tell.
Does anyone have anything from BMW that indicates both front diff is part of this 1200 mile/run-in service? The F90 training manual definitely indicates the rear is but nothing about the front.
At the end of it all, I might just have to trust that they did what the computer told them to and that it knows better than I do -- hard to believe but definitely possible!
