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As other reviewers have noted I wasted several hours of my life in ordering two of these harnesses and in the end both failed to deliver what they state they could do. I have a 2010 Mercedes Benz GLK-350 non-premium but don't think that matters as all other cars listed I am not confident this product is for my car despite many sites stating otherwise. Sad, in the end lost all functionality of my steering wheel controls for a radio that now feels like a very expensive Bluetooth speaker.