Introduction
A video about installing MP3 Player in BMW E39 http://www.youtube.com/watch?v=_6wg3qTvU....
Tools
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            Remove screws holding the CD changer in place (if equipped) 
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            Disconnect BMW CD changer 3 pin power plug and 6 pin audio plug from CD changer. 
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            Connect MP3 Player to original CD changer connectors 
 
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            If using the 3 and 6 Pin connector version MP3 player, you will need to connect the unit to a switched power source in order to retain its last song played memory function. 
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            A good connection for BMWs built after Jan, 2000 production is the SES wiring plug, which is no longer used in cars that are equipped with the BMW Bluetooth system 
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            Switched power is located on pin 24 Violet/White (or Violet/Red see image. 
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            If you are also installing the DSP adapter module with your MP3 player you can connect the DSP module adapter to this pin in addition to using pin 14 brown/black for ground. 
 
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To reassemble your device, follow these instructions in reverse order.