This is the first time it has done so. The tank was quite empty, but not dry - I got 57,5 litres in it.
With the onboard diagnostics section 6.0 it says __0363 and I also get the 1_6.2 display, which, according to the sources I have, should eman that both floats work.
Anyone had this problem? Will I have to dig into the tank and change the floats?