Join Date: May 2009
Location: UK and Katowice, Poland, plus All Europe
My Motorhome: Niesmann+Bischoff Arto 69GL (2003)
Thanked 429 Times in 381 Posts
There can be one problem with trying to assess the amount left when the warning lights; by filling up and deducting the fill amount from the tank capacity to arrive at the 'reserve' figure.
If the forecourt is not level when filling the fill can be less than to 'full tank'.
E.g 100lt tank
There is 10lt remaining before fill.
Fill on flat would be 90lt
Fill on slope might be only 85 lt (or less)
Leading one to believe 100-85 = 15lt remaining, when in reality it is 10lt