Fuel Tank left: Useable fuel quantity 30.6 liters, not useable 1 liter. The fuel probe is a Princeton Capacitive Fuel Level Probe, 5 set point model. First: calibrate the fuelprobe, EMPTY, 1/4 set point, 1/2 set point, 3/4 set point and FULL and then the calibration in EFIS/EMS according DEK180 manual.