I have a 2003 M5 build date of 03/03. My dealer is telling me I do not have an antenna for a cell phone despite the fact that the car is pre-wired for a cell phone. I have lost confidence in the service department becuase at first they tried to tell me that the antenna was connected via the bluetooth connection. After some research the service advisor admitted that the antenna had to be hard wired but that I do not have one in my car and they need to "install" it. Any help will be greatly appreciated.