The circumstances ans order fits with a failing voltage regulator on the alternator.

Monitor your voltages real-time with three hidden menu. Look for dips close to 12v it should never happen.

AUC is the "nose" that sniffs the air for petroleum and the HVAC uses to turn off outside air.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)