Date registered: Aug 2008
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2009 ML350 Trailer Harness
I installed an aftermarket receiver hitch on my 2009 ML350. I am now trying to find the wiring harness hook up for the trailer plug. The dealer is telling me that i have to buy a special harness and an SAM unit and have the entire computer reprogrammed for $1400.00!!
All I need is two turn signals, stop and running lights! Does anyone know if their is a factory harness at the back of the car like every other car manufacturer has? If so, where is it? Or can I just connect my wires to the tail lights like we have all done in the past or will it affect the computer?? Help!