Mercedes R Klasse Diesel Water Sensor Fault

Sounds like you've got a bit of a gremlin! I had a similar thing happen with my old Fiat Punto, only it was the oil pressure sensor acting up. The water sensor, huh? It's basically the car's way of saying, "Hey, something's fishy with the water levels!" Think of it like your car having a bad case of indigestion. Did you check the connections to the sensor itself? Maybe wiggle them a bit? Sometimes it's just a loose connection causing all the drama. Also, have you thought about checking the wiring harness for any signs of damage? Like a chewed wire or something?

Regarding the cable connections, could you provide more specific guidance on the sensor testing procedure? Are there particular voltage or resistance values one should expect to observe during measurement? I wish to confirm functionality prior to seeking professional intervention.

So you're going full-on DIY, I respect that! Honestly, when my Fiat freaked out, I poked around for a bit, but auto electronics aren't exactly my strong suit. I ended up taking it to a workshop. They hooked it up to some fancy gadget, diagnosed a faulty sensor, and replaced it. Cost me a few bucks, but saved me a headache. I would suggest the same. Save yourself time and headache and let a professional mechanic check the car sensor.

I appreciate your shared experiences and subsequent recommendation. Following your advice, I engaged a qualified technician who confirmed the defective connection. The cable was replaced at a cost of 95€, resolving the malfunction. Thank you again for your assistance.