Nauticare94 - glad you got it fixed. Is your alternator working fine?

Others - what was the key clue in the symptoms to point to the battery? I had no idea on this one. Is the AC shutting off a power saving clue (I guess these cars are pretty smart)? And then all that other weirdness???

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2001 X5 3.0i, 203k miles, AT, owned since 2014