johannesschaefer63
R Klasse oil temperature warning light issue
Summary of the thread
A 2017 Mercedes R Klasse owner is experiencing an issue with the engine oil temperature warning light and occasional oil pressure warning. The problem may be due to a faulty engine oil temperature sensor or its connection. Erratic temperature readings suggest the sensor or its connection might be defective. Replacing the sensor resolved the issue, confirming it as the likely cause.
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4 comment(s)
johannesschaefer63 (community.author)
Thanks for the quick reply! That's helpful. Regarding your question: the temperature reading seems normal for a while, then suddenly jumps erratically or drops to zero right before the warning light illuminates. Did yours behave similarly?
sebastianhunter6
Yep, that's precisely what mine did! Erratic readings then BAM! Warning light. I'd say it's highly likely the oil sensor is the issue. I'd recommend getting it checked at a workshop, though. They'll confirm for sure, and save you the hassle of replacing it yourself if it's something else.
johannesschaefer63 (community.author)
Thanks a lot for confirming! It's good to know someone else had the exact same symptoms. I'll take your advice and get it checked out at a shop. Turns out it was indeed the temperature sensor and the cost was just about as expected. Replaced it and all good now. Appreciate the help!
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MERCEDES
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RKLASSE
sebastianhunter6
Dude, sounds like a total drag! I had almost the exact same thing happen on my R Klasse. Oil temperature issues are a pain! Check the oil sensor connection, man. Could be loose or corroded. Quick question: Does the temperature reading seem plausible before the warning light comes on?