changing this coding adds the features to the MMI menu items.
As far as OIL level goes, my car is a pre-facelift and it didn't show OIL Level, but now I have activated that and now I have it. Also with the front seat heating, again my car being a pre-facelift, I couldn't adjust to where the heating would bias too, e.g. more to your back or more to your bum.......now I have that additional control to alter the bias of the seat heating.
Adding AUX gave me an additional input and also my car didn't have BLUETOOTH, now I do!
In the Audio section, yes, I have now FM, AM, CD, CDC(iPod), AUX, TV, DVD, PICTURE and TONE(which takes me to the L7)