The coolant temp sensor on my 300SE M103 block is cracked and I'm looking for a replacement, the one on the block is green and the only ones I can find are blue. Can I use a blue sensor?

Coolant Temperature Sensor (2 Pin)

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).

https://www.peachparts.com/shopforum/tech-help/393527-3-pin-coolant-temperature-sensor-questions.html

This doesn't exactly answer the question; but, it is some direction/steerage.

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

Ordered the blue one, we will see.

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).