This kind of system generates a full size rack which is situated above your Mercedes X-Class's 2017 w/ MB Style Bars lot understructure. This specific Slimline II items carrying rack system includes the Slimline II tray that holds the paper 1345mm x 1560mm plus four Pickup Truck Bed Universal Legs which usually go with the present factory/OEM understructure path. No drilling required.All Front Runner Rack Kits come with installation instructions, along with all of the pieces necessary to mount the Slimline II Tray in your vehicle.All Front Runner Racks are supported by a tight Lifetime Warranty. Installation Guide Part one, Part two, Part three...