PeachParts Mercedes-Benz Forum - View Single Post - Where's the Coolant Temp Sensor and how do I test it? '86 300E

samiam4 · #10 08-08-2006, 11:48 PM

Larry,

Mine just was out of range and the next year I decided to replace it. Emission testing showed a bunch better. It alway had this slightly rich at idle carb smell to the exhaust. I also replaced the o2 sensor and between the 2 I picked up some mileage.
I don't remember them being expensive. The switch (non gauge sensor) there were 2 different ones. It is engine serial number dependent and that might make it clear which one to get via a catalog. Memory says the gauge/injector sensor was $35 dealerwholesale and maybe $25 for the early style (3 pin green switch). Oh, the gauge sensor is a brass body no plastic except the insulator around the single pin.

Talk with a real parts guy and this should be easy.

Michael