1999 Model Year Radio Changes

• The 1999 model year radios do not have the weatherband feature.
• RDS  = Radio Broadcast Data System. In the future, this button will put the vehicle occupants in touch with a wide variety of broadcast data including weather information.
• PTY  = Any unit having RDS will also have a separate button for the PTY feature. It stands for Program Type and will indicate the type of music being played.

Fig 1: BMBT Flow Chart With Interfacing Control Modules

Courtesy of BMW OF NORTH AMERICA, INC.

The BMBT communicates with interfacing control modules via the K Bus. As with all previous Original Equipment Navigation Systems, the radio electronics are installed in the trunk. The BMBT sends and receives operation instructions to the radio via bus communication. The Mark II Nav computer continues to provide the RGB output signals to the BMBT for system function display.