Get the MB connector, the mating plug and the feed thru grommet is there. The factory hitch fits perfectly also, and is a snap to install. If you splice in I am shure your bulb out warning light will come on. You remove the bumper via some small bolts under the covers, bolt The hitch on and you are done 1 hour labor at MB. The only thing good, I could ever say about my ex-ML.