Probable cause.......from a new owner:
"First minor glitch:
- I received low windshield wiper fluid alerts every day until we brought the car in for inspection. The fluid level was full. It seems the on board computer was out of synch w/ the initial fluid level. It's good now."
Source:
http://www.bimmerfest.com/forums/sho...d.php?t=828125
from bimmerpost.