So it goes like this ...
These in-tank resistive strips were BMW's cutting edge answer to the old float and lever arrangement, but they still have yet to get it right. 2005-2008 K12 owners are gonna have this unit fail, it's just a matter of when. Gas range on the LCD display will be all over the place or in my case it just gave up and never registered even a full tank of gas. If it fails outside of warranty, it's about $300-340 from a dealer to replace, update the software, then calibrate. You then have 2 years of warranty in case it fails again.
The only upside is that while was waiting for the replacement, software update, calibration and road test (estimated at 1 hour, mine is a 2007 that had never had it's software updated, so it actually took 3), I started picking out bikes on the showroom floor and taking them out for test runs. They had my $16K K12 there as collateral, the showroom was dead, so they were pretty good sports about it.
Ended up having a lot of fun on a Triumph Thunderbird, specifically.
Sure, it sucks, but it is what it is.