Trailer Hitch Wiring | Mercedes-Benz Forum Apr 26, 20152004 ML 350 Trailer Hitch Wiring I just installed a hitch receiver for a 2004 Mercedes Benz ML350. I have included detailed instructions on how I installed it, including the wiring (U-Haul wiring kit Part# 13493). Please note, the wiring described below is for informational purposes only. Related searches for mercedes benz wiring harness tow mercedes benz stereo wiring harnessmercedes benz wiring harness problemsmercedes benz wiring harness rebuildermercedes engine wiring harnessmercedes wiring harness repairmercedes w126 engine wiring harness95 benz s320 wiring harnessbiodegradable mercedes wiring harness