I have a problem with the tank indicator. Although I had filled some 5 liters of petrol with empty CNG gas tank and the broth was almost upper edge, the petrol indicator with empty CNG still counted from 30 km range down to 10 km. The tank should be full, but the indicator says “10 km”. What happened and what can I do? Must be ventilated? How does it work? What if the swimmer hangs? Does anyone have an explanation??? I was fortunate to then refuel CNG and still the Reichw I’m at a loss what I can do myself before I have to go to a workshop. I’m grateful for any help.