If you have this problem you must print both parts of the 3d printing project. If not then you won't get the organizer you want. To assemble this 3d printing project you just have to put the rectangles from the project called extensions and add-ons. The rectangles that you will use should be would be the ones that are thick and pretty small. The two big and thin rectangles are extensions if your car counsel is bigger than the one that is printed. The 3d printing project is specifically for the Mercedes GLK 2015 model. But the extensions can help fit the adjustable counsel organizer in any model car that there is.