Thank you all that worked as suggested.
Connected new battery, everything came up. let the timer run down and the car started up no problem and then I went into the menus and disabled the code.

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This has been a long obsession.
Current Cars- 2006 X5 3.0, 2013 328i Xdrive Msport
Previous Cars- 2007 328i, 2007 Z4 3.0si, 2006 330ci, 1985 325e and a sampling of Fiats, Volvos and VWS along the way.