Mercedes KE-Jetronic - The Coolant Temperature Sensor for Mercedes W124

The Coolant Temperature Sensor- Another of the series on repairing and demystifying the KE-Jetronic
One of a very important parts of the KE-Jetronic that can go bad after 100k miles. This part reports the ECU whether the engine is cold or warm. When the sensor goes bad it reports the ECU that the engine is always cold so that the ECU makes the mixture rich and you have higher fuel consumption.
Grab your multimeter and check the sensor if it is good or not. An easy way to find out about a serious issue on your engine. If it goes bad replace it with either BOSCH or HELLA.
Starting music: Mian Haroon - Love is Life Music M H vol 6
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Timecodes
0:00 - Intro
0:23 - 1:10 About the Coolant Temperature Sensor
1:11 - 1:20 Location of the CTS
1:21 - 1:40 Types of the CTS
1:41 - 1:49 When does the sensor go bad
1:50 - 4:00 How can the CTS be checked and the nominal values
4:01 - 4:58 Measuring the CTS hen the engine is cold
4:59 - 5:46 Measuring the CTS warm
5:47 - 6:04 The conclusion about the CTS
6:05 - 6:37 Like, share, comment, subscribe

What am I talking about?
My topic is the KE-Jetronic injection system which I try to demystify as much as I can.
For all of you to understand the system in brief - Developed in 1973 and being mounted into cars up to 1993 as it went in history. But why these to letters!?(KE) K(from German "kontinuierlich" meaning continuos, without interruption) the MECHANICAL injection system on which the fuel starts flowing from the fuel tank sucked by the FUEL PUMP and delivered to the FUEL DISTRIBUTOR which sends fuel to the INJECTORS while the majority of it flows through the FUEL PRESSURE REGULATOR through its return line back to the fuel tank again. The letter E(electronic) has to mark the electronic sensors (the developement starting from early eighties) which had to inform the ECU about the current state of the engine so that the ECU(Electronic Control Unit) then could create current signal in mAmp(miliampers) and send it to four crucial components for the system - the EHA(the electro-hydraulic actuator,a unit consisting of a magnet, an electromagnet and a baffle plate) which had to fine tune the engine in each of its phases, the ICV(the idle control valve), the unit which was predicted for the engines perfect idle, the X11(the diagnostic socket) where the duty cycle(the ideal mixture) was adjusted and the X11/4(the code reader) - the socket which from any codes were read if present using an OBD1 scanner.
An extraordinary injection system which could be fully repaired in your own garage using a multimeter and a pressure gauge only for its fine tuning, together with some common tools.
"Happy Mercedesing"