Works great on my Q7. I just bought a trailer with LED headlights and whatever adapter the trailer seller sold me didn't work - the lights were very dim and flashed all the time. I called my local Audi dealer thinking they had to do something about the car but no - they said it was already fitted with a towing kit and hooked up to a trailer. I went to Amazon, found this thing and bought it. The trailer only has 4 prongs, but it still works.
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