Thank you so much and sorry for the late response.
Yes, we set all like you wrote on the configurator and saved settings to the device, but we couldn´t find fuel level - io_48 (Property ID in AVL packet) for the both cars on the server messages (there were many others /we selected almost all OBD possibilieties/ parameters, but not the fuel level - io_48). Is it please possible that both cars doesn´t support fuel level via OBD?
Thank you for all your replies.