Routinely, my G05 will sit for weeks and months at a time while I drive a different vehicle. After a year old, it starts right up every time and no pop ups or messages. I can't be bothered hooking up a trickle charger.
I wouldn't worry about an month at all. And if it doesn't start, I'd just call BMW assist.
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Current- '21 430 , '19 911, 07 M6 ,'17 Jeep Wrangler, "23 Bronco OBXluxsquatch
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