Have the Most adapter waiting to be installed as soon as my car arrives withing the next 2 weeks.
The dealer charges you only 2 hours and Bmw pays the rest.
This is a standard Bmw policy. It does take about 4:30 - 5 hours install but they can only charge you 2 hours.
So whoever your dealing with is feeding you Bull...
Call another dealer or ask to speak to the Manager.