The driven distance is automatically calculated by the device inside the car. There is no need to make note of the car’s mileage.
Depending on whether the car is compatible or not, the fuel level will also be recorded automatically by our device. If the car isn't compatible, the driver will input the fuel level manually at check in and check out.
If the distance was underestimated, or the level of gas in uneven, an adjustment can be made after the rental (more information here).