Someone posted a link to some BMW marketing material that suggested that the alternator has some sort of clutch that reduces or disengages completely when the M40i is under acceleration, and conversely engages when decelerating - hence the charging icon.
As stlcdr says, this topic came up some months ago in another thread, but it's difficult to find via forum search.
Quote:
Originally Posted by alvitdk
That's what I thought, but that leaves me with the screen showing a "Power Flow" from the transmission to a "Battery", but only when braking, not when driving or coasting...  |