80 amp is what I have read also. I would like to go 120 if even possible. I can keep all four seats on high heat unless I have rear defrost and headlights on, then one or two will start blinking indicating there is low voltage. Or the defrost may blink also.

I will have to dig into it further. The odd thing is that its VERY consistent. It will always happen. So the past two cold starts I fired it up for only about 15 seconds. Then shut her down and started up again. No issue.

Whatever it is, its confusing. Wonder if its vacuum related instead.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car