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Outstanding Contributor
450slc5.0cab 280sl5sp 280se4.5 500seAMG +250seStkW108 350sl4spdX3 500secEuro
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Sorry I don’t know the answer to your question, but...
1) based on your other posts, aren’t you working on a w116 d-jet m110? That was not ever used in a w126 (the forum this was posted in).
2) I was unaware of any crank position sensors on any cars before 1986, at least ones that were used for ignition timing. I think it’s possible this could be just a sensor that makes sure the crank is spinning, and maybe just shuts off the fuel pump if the crank isn’t spinning. I don’t know.
 

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2008 AMG CLK63 Conv., 2012 R350 4-Matic, Wife's 2015 C300 sedan
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9,450 Posts
Crank position sensors use a magnet, a coil and a lobe or something on the crankshaft to create an electric pulse each time it goes around.
Eventually they fail.
Only option is a new sensor.
 

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Discussion Starter #4
Thank you Fonzi! That's right, I'm working on a 1976 D-Jet 280SE. I can gradually understand all the components of this engine, because I am beginner in mechanics. Although I don't have time to work in the car, it's fun.
 

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1990 420 SEC
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On M110 engine as in w126 280 SE the position is red at distributor. The should be a part that looks like six pointed star on the shaft and a similar part on the stator. No breaker points. Car with D-jet has several sets of breaker points at the distributor I have heard.
 
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