7 Pin Trailer Wiring

7. GL Class (X166) - 7-Pin Trailer Wiring (backup lights??) - GL450 has a 7-pin Trailer Electrical Outlet next to the Hitch. Anyone have a diagram of which pins supply which functions? I am trying to determine which pins are necessary for backup lights to come on when the vehicle is put into reverse. Also, is there a... mbworld.org

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