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philippstern1

Mercedes GLE Windshield Washer Heater Problem

Windshield washer heater issue on Mercedes GLE Diesel from 2016. Wipers are fine, but I get an error related to the windshield heater. At colder temperatures, the spray nozzles seem clogged. Error memory shows a fault related to the washer heater. It could be a defective cable or plug connection. Has anyone else experienced this? I am looking at a 95€ repair bill. Any ideas before I commit?

Summary of the thread

A 2016 Mercedes GLE Diesel owner experienced an issue with the windshield washer heater, leading to clogged spray nozzles in colder temperatures and an error message. The problem was suspected to be a defective cable or plug connection. It was suggested to inspect the wiring harness for loose connectors or corroded pins. Ultimately, a workshop diagnosed and resolved the issue by cleaning a corroded connector on the washer heater, restoring proper function for a 95€ repair cost.

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4 comment(s)

raphaelhimmel1

I have a GLE, and I dealt with something similar last winter. The windshield washer system became a real headache. The principle is akin to a household appliance – a faulty connection can disable the entire system. If your nozzles are freezing despite the heater supposedly working, it strongly suggests the heater malfunction is indeed the culprit. Have you inspected the wiring harness leading to the washer heater? A loose connector or corroded pin can cause intermittent issues.

philippstern1 (community.author)

Thanks for the insight! I haven't had a chance to deeply inspect the wiring harness myself. Where exactly is the washer heater located, and is it easily accessible? I'm wondering if it's something I can check myself before taking it in.

raphaelhimmel1

The washer heater is typically integrated within the washer fluid reservoir or very close to it. Access depends on your specific GLE configuration, but it usually involves removing some trim or accessing it from underneath. Given the diagnostic code points to the heater and the nozzles are freezing, I would advise against extensive DIY troubleshooting without proper tools and experience. Incorrect handling of electrical components can lead to further issues. The 95€ quote seems reasonable to diagnose and repair a potentially faulty connection; a workshop will be able to test the heater functionality and pinpoint the issue efficiently.

philippstern1 (community.author)

Thanks, that's helpful. I appreciate the advice. I'll take it to the workshop, as suggested. Turns out it was indeed a corroded connector on the washer heater. They cleaned it, applied some dielectric grease, and the error is gone, and the washer fluid is spraying as it should. 95€ well spent!

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MERCEDES

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GLE