@wpoll : with thise readings, where was the needle on the gauge?

The previous time I filled up and insisted after the pump clicked, I got it up to about 80L and and the needle was stil 2 or 3 milimeters below the full mark.

I'm going to browse the various software to see if I can find something regarding the gauge calibration or sender calibration since the math from XXX Ohms to XXX Liters has to come from somewhere and I'm quite sure my cluster is the same as an M5 (4.6is) that probably doesn't have the same tank size (quick google say 70L and 78L). I'll have to check in the software if my cluster is original.
If my gauge is set up for 82 ou 93L (this still is a mystery) but the sender interpretation is set up for 70 ou 78L, it would explain the slight discrepancy. I'm not going to enjoy this considering the cold but I'll try and look into which module reads the sender units.

If it keeps bugging me, I'm going to change the pump and sender assembly but considering the left one is new (3 month old) and straight from BMW and it doesn't register completely full either, I'm perplexed.

I did however notice that while driving with test No6 opened, I see fuel going from left to right more "actively" now the tubes are in the correct place.

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2002 4.6is silver on black