I'm looking for a 12v supply that comes on and stays on when the car is unlocked (rather than ignition based). E90s apparently have an "awake" circuit that is controlled by a number of events (unlock, door open etc).
(Details here: http://www.e90post.com/forums/showthread.php?t=841663)
Does the Z4 have an equivalent?
(Details here: http://www.e90post.com/forums/showthread.php?t=841663)
Does the Z4 have an equivalent?
