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Heat Range 7 gap of .8mm is factory I believe, have seen some people running 1.1mm also.Just got car and was going through the fluids and etc. Car has low miles but wanted to put new set in because they are 5 years old and also I belive the stock plugs are platinum correct me if im wrong. what plugs are you running in your S240 ? thanks.. Also I searched first but really didn't come up with much specific to this car...