Daimler Trucks North America LLC (DTNA) is recalling certain model year 2014 Freightliner 108SD, 114SD, 122SD, Coronado, Argosy, Cascadia, Columbia, and M2 Business Class, and Western Star 4700, and 4900 vehicles manufactured August 5, 2013, through November 15, 2013, and equipped with IMMI-brand L9 seat belt buckles. When the button is pressed to release the seat belt, the latch plate can become partially engaged with the buckle, making the seat belt difficult to unlatch. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 209, “Seat Belt Assemblies.”