"Why would the moon roof flip open with this warning also?"

Very strange...I would think it was the vacuuming and cleaning that killed the battery, exactly my initial scenario....my car was happy to tell the dealership that I didn't drive it enough and that i had left the doors open too long over the weekend!

Depending on vehicle year i think there was a TSB/SIB about the battery...do a search here and maybe you'll find it..

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