Here you can check/modify your Default Car.
Since you are not logged in, you will have only the Default Car available.

To check and modify your car, open the tab content by clicking on it. You will to see and change the car details. After you changed one or more detail, press the SAVE button on the bottom right of the tab. The estimated routes (Map and routes page) will have a new consumption and emission output, based on the changes you made; remember to click the refresh icon on the Map and route page to see it in action.