For the 2004 Mercedes-Benz S-Class we have one confirmed hitch fit, the Class I Curt hitch # C11823, which fits the sedan with 220 chassis. You can check with a local dealership using the car's VIN to confirm which chassis it has.This hitch is a light duty model with a 1-1/4-inch receiver opening and it bolts on using included hardware. Installation instructions are linked for your reference. view full answer...