So the 4.6 is in hibernation for the winter still in a heated garage with the garage tstat set to 50F. I started the x5 last week sometime and today I went to do the weekly start and warm up and it is completely dead again. It's been fine until today. I will recharge the battery again and disconnect the kenwood aftermarket radio...

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02 Imola on Black Dinan S2 4.6iS
00 RoyalRot on Sand/Black 740i Short Sport