The W164 refers to the second-generation Mercedes-Benz M-Class (ML) or GL-Class (X164) produced from 2005 to 2011. While there is no automotive component officially named "radiator jerrycan" for this vehicle, the phrase typically refers to the radiator coolant storage container, known as an expansion tank or coolant reservoir, or a portable fuel/fluid jerrycan used for off-road/overland expeditions