126411 Adapter cable MP: Notes
WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
(Adapter cable with diode) For reverse polarity protected connection to a 12 volt-voltage source Engine: M50, M52, S62, S54. Only available as part of complete tool set 12 6 410 - (83 30 0 491 148).