I have taped a wire thermocouple to the dip stick plastic part and when I insert it it reads the temperature and then I pull it and read the correct level based on the temperature of the fluid. But usually you do not need the teperature if you are checking it in the morning before driving then it is cold and when you have been driving for a while then check the level it it will be hot.

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2010 ML350 Bluetec
2012 Mustang Convertible