I bought this 2004 545i in Oct 06. It had 48k miles on it and was in near perfect condition. I had problems within a month of driving it. The default light for almost every system alarmed. After 4 visits I bought a new $170 battery which fixed all the problems BMW could not. Recently the transmission default light came on. BMW offered to fix it for $8200. Ridiculous!
heads up display voice activated nav and entertainment