Download Print Press Kit: 2006 Ram Mega Cab, What's New for '06 2006 Dodge Ram Mega Cab Product Chronology Auburn Hills, Mich. August 31, 2005 - The Dodge Ram Mega Cab makes its debut in the 2006 model year. Based on the Dodge Ram heavy-duty structure, the Mega Cab cabin is stretched an additional 20 inches (when compared with the cabin of a Quad Cab), resulting in a truck that is second to none when it comes to interior space and overall functionality.