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 ...
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Not sure what this has to do with RVs. Assuming you're coming here in case someone has a similar issue. I had the same problem with my Mercedes based motor home and LED wireless lights on our toad. Tow lights require a certain voltage. The Mercedes equipped with LEDs sends too little voltage to the trailer wiring harness and they don't behave as a result. Sounds like you need a resistor adapter. It will trick your trailer lights into getting the proper voltage to work. Worked in my case anyway.
Yes, sorry, I was pushing the limits of "RV" with a boat trailer, thanks for replying. I did get an adapter from Curt that claimed to solve this issue but unfortunately did not. It DID make the difference on the temporary light system, as the initial 7-pin/4-pin adapter didn't even do that. Can I ask what adapter unit you had success with?
