Mercedes/Trailer Lights Compatibility Issue
Hi all, I'm having a strange electrical issue and would be grateful for some advice. We recently purchased a used boat trailer and a 2020 Mercedes GLS 450 suv to tow it. The Mercedes has a 7-pin ...
Forum Discussion
Not saying this is the case, but "SOME" manufactures use a separate wire for the brake and turn signals per side vs the left side pole being both brake and turn, same with the right side. I had this issue with a few Japanese - Toyota and Nissan trucks in the past. I needed an adapter that made the wires combine to work. Despite having an ML320 for 20 years, never wired it nor towed with it, I don't know if their wires are like the ones I described.
The adapter is rather easy to find at any auto/RV parts outlet.
Marty
