I didn't get the one from Napa. I got the one from fastlane http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1984%40%401984&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6233%3AED|10000135%3AMBC|1518%40%40300TD&keyword=temperature&subcatid=P:240675@@Water%20Temp.%20Sensor&mode=PA

I will check the resistance when the car is cold then... ack!

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1984 300td euro turbo