There is something really mysterious with my 1999 BMW 328i. Today, I left it in a parking lot to go get something, when I got out, the high beam lights were flashing. Tonight, a lady knocked on our door and told us that our car's lights are flashing. I didn't know the reason. I tested many things (like trying to open it while it's locked, pushing it up and down, kicking it) nothing made the high beams flash. Any ideas/solutions?