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My 2012 650i convertible (F12) is stored during the winter season and the negative terminal is disconnected from the main battery to prevemt drain. Is it advisable to also disconnect the negative terminal from the auxiliary battery?
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2007 BMW X3 2.0i E83
2012 BMW 650i Convertible F12
2023 BMW X3 Xdrive 30e G01
Gone: 2002 BMW 330i Convertible E46
2020 BMW X3 Xdrive 30e G01
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