This kit creates a full-size rack that sits above your Mercedes-Benz X-Class?s (2017 + w/ OEM bed rails) load bed. This Slimline II cargo carrying rack kit contains the Slimline II tray (1475mm x 1560mm) and 4 Pickup Truck Bed Universal Legs that fit into the existing factory/OEM bed tracks. No drilling required. All Front Runner Rack Kits contain installation instructions, as well as all the components needed to mount the Slimline II Tray to your vehicle.All Front Runner Racks are backed by a Limited Lifetime Warranty* * Note: A maximum driving speed of 130km/80mi per hour should be adhered to, when equipped with a Front Runner Roof Rack or Load Bar kit.