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Old 10-22-2014, 12:24 PM
Benz Mondi
Join Date: Nov 2006
Location: Sacramento area
Posts: 308
1986 300e sending units on the head?

I used to know this, but can't remember at this moment.
On the cylinder head there are two sending units: one with a red collar (smaller diameter) and one with a green collar (larger diameter).

What are these?



03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio
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Old 10-23-2014, 02:46 PM
Registered User
Join Date: May 2006
Location: Hudson WI
Posts: 178
I can give you a little help, but I can't solve the entire puzzle.
If I remember correctly; closest to the firewall signals the ECM, the next one has two vacuum lines and manages gas recirculation, then one controls the auxiliary fan for over heating, and the last one is for the temperature gauge. I think the ones your referring to are for the temp gauge and the aux fan; but I can't remember which is which.

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