No, fuel (petrol or electricity) is included in the price. We do expect you to fill up if the tank is less than 1/4 full. If you drive electric, you will need to reconnect the car to the charging station after each trip so that the car can recharge. You will only have to recharge on the way if you cover more kilometres than you gave in your reservation (range). This way, the user after you can leave without any worries.
You pay with the fuel card or charging card in your cambio car. The bill goes directly to cambio.