Does anyone know what the resistance should be on the outside temp sensor (the one that runs from behind the licsence plate to the dash) for a 1987 190D at different tempratures? Mine never gave the right temp on the display and I am wondering if the problem is in the display or in the sensor.

I have the instrument cluster out at the moment, so it would be a good time to replace it if it is faulty.

Thanks to all
George