So i just got an update. The active steering unit woke up the car in the middle of the night and prepared the car for a driver to enter it and start it. It kept going on and off all night which eventually killed the battery.
BMW waterloo says ill have to install a new active steering unit.
I have already sunk 3000 + dollars on this battery issue and this unit with labor will cost me another 2300 $$. Does any one have an alternative? what should i do??
It's quite possible that my battery and alternator weren't bad to begin with and just the active steering was bad but obviously they won't tell me that ...