My 2011 plus 4 fuel guage works well. Starts at full and works its way towards empty.
I am almost expecting it to fail any day! I do however tend to fill up at around 250 miles just as a precaution.

Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016