Hello:
Another Canadian here to answer your question, but first I need to make sure I understand exactly what you are trying to accomplish.
If your objective is to stop the chime that activates when the driver door is opened with the ignition on, that is a very simple "one-action" tweak:
1. Open controller 09 (Central Electrical)
2. Go to the adaptation channel "Clamp Control"
3. For the parameter 'Ignition Active Message', select 'no display'.
But, having said that, if other family members use the car, I suggest you not disable the chime.
On the old 7 Series, you knew that the engine was running when you opened the door with the ignition on because you could both hear and feel the engine running. There was no risk that you would walk away from the car with the engine running. The new 8 series has the automatic engine start-stop feature. This means that when you put the transmission in Park, the engine will stop to conserve fuel. With the engine turned off by the automatic start-stop feature, it is possible to open the door and walk away from the car with the ignition unintentionally left on. I did this twice during the first few days I had the warning tone turned off.
The warning tone for ignition on with driver door open is more intelligent on the 8 Series than it was on the 7 Series. It will only make about 10 chime sounds if you leave the door open, then it will stop making sounds. If you then close the driver door and open it again (during the same ignition on cycle), it will only make 2 chime sounds for the second (and all subsequent) cycles of driver door being opened and closed.
Hope this information helps you.
Michael