S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

M120 CMP Hall Effect Sensor

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Old Jan 25, 2015 | 07:13 PM
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From: Fargo, North Dakota
1973 Lincoln Mark IV
M120 CMP Hall Effect Sensor

First off 1993 S600, engine only - no car.
I have been searching the internet high and low to find this information but it seems to be a great mystery somehow.

The CMP (Camshaft Position Sensor) on the Mercedes M120 is apparently a hall effect sensor, but I need to know what sort of signal generator it uses. From what I can tell without dismantling anything it runs off of the distributor's "intermediate" gear, but I don't know how. Is it a single tooth, a missing tooth, a 50/50 wheel, or something else?

Anyone ever been this far into one of these to find out?

Are they different on the later units, I know they changed the sensor slightly and perhaps (like the flex plate) they changed the tooth count as well?

Thanks in advance,
Chris
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