The Temperature-sensor in the block isnt a mechanical device as described above!

Its a Thermistor. A Thermistor is a specialised resistor that changes resistance due to temperature. It has NO Moving parts....

The guage is supplied by a regulated voltage. The other side of the guage is grounded via the Thermistor.
As the temp increases, the resistance of the thermistor falls, increasing the current flow, and guage reading....

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Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....