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I have a 2014 ML350 with a w276 engine and I cannot seem to locate the Coolant Temperature Sensor. Does anybody know the location or happen to have a diagram for this engine that might include some insights?
I have a 2014 ML350 with a w276 engine and I cannot seem to locate the Coolant Temperature Sensor. Does anybody know the location or happen to have a diagram for this engine that might include some insights?
From memory it is integrated into the t/stat housing. Or at the rear or one of the cylinder heads.
Thanks for your response! I checked the housing...not there. It could be off the cylinder head..... really tough spot to see against the firewall especially if down near the bottom. I tried a mirror but did not have any luck.
My mistake.. I was thinking about the thermostat. As @chassis mentioned, and I think @S-Prihadi discussed in one of this thread the temperature sensor is at the back of the engine near the firewall on the engine's left side. Apparently is lower, and you may need some kind of mirror tool to see it.
Thanks again for sharing this info... very helpful. I believe I finally located the sensor but it appears to be protected by a heat shield. I was able to remove a torx screw from the top of the shield but I cannot get it it move or open. Any experience with this?? Picture attached.
You're into a project. The black tube and bracket needs to be removed. Look through @S-Prihadi 's posts, and he may have addressed this.
Surf ebay engine listings to get familiar with the rear of the engine and all the pieces and parts.
Remove all of the torx screws you can access, and see if you can then get to the coolant temp sensor. If not, the vacuum pump may need to come out.
I thought WIS for this is posted on this site somewhere. This W204 M272 thread shows WIS requires vacuum pump removal. I would say it's not out of the question for 3.5L M276 that the vacuum pump also needs to be removed to access the coolant temp sensor. https://mbworld.org/forums/c-class-w...c300-w204.html
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