If your vehicle has less than a quarter of a fuel tank at the end of the booking, you need to refuel before dropping it off. This rule is necessary to ensure that the customer can start after you directly with his ride. Therefore, keep an eye on the fuel gauge and, if necessary, drive to a partner gas station before the end of the booking in order to deliver the vehicle with at least 25% tank capacity.
Please note that you may be charged a fee of 15 € if the return the vehicle with less than 25% fuel.