Trailer Wiring Harness Installation - 2003 Mercedes-Benz M-Class Video

How to Install a Trailer Wiring Harness on a 2003 Mercedes-Benz M-Class

Today on our 2003 Mercedes M Class, specifically the ML 350, were going to install the Curt Circuit Protected 4-Pole Wiring Kit, part number 56146KIT. To begin our install, well first remove the tail light assembly here on the drivers side. There are two fasteners that well need to remove. Then well go ahead and pop the tail light assembly out of its position and use our circuit tester to… see more >