This kit is designed to ensure a perfect connection between the windows and the roof rubbers, making them last longer. This is achieved by automatically lowering the windows by 2 centimeters when a door is opened, and automatically raising the windows back into the roof rubbers when a door is closed. This feature is being implemented in newer convertible and coupe cars. With this kit, the automatic window control is also added to the passenger side (like the driver’s side in a standard Barchetta

look youtube ; Fiat barchetta Windows up and down by open and closing doors