The OE wires have resistance built in and some people use resistor plugs as they are easy to find. Many people have idling and power issues running resistor plugs, some do not. I would not mess with what the factory designed when it comes to this. MB did not just flip a coin on which type to put in. So stick with what they sent the car to you with.
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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k
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