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I have a 2023 GLC 300 4Matic SUV.
I read on the website of a distant Mercedes dealership's Service Dept that they recommend changing the engine coolant every 2 years or 30,000 miles.
My local Mercedes service advisor said that's not necessary, that's too frequent. He recommended no sooner than every 5 years or 50,000 miles at the earliest.
Just wondered what other GLC 300 owners think is appropriate.
I have a 2023 GLC 300 4Matic SUV.
I read on the website of a distant Mercedes dealership's Service Dept that they recommend changing the engine coolant every 2 years or 30,000 miles.
My local Mercedes service advisor said that's not necessary, that's too frequent. He recommended no sooner than every 5 years or 50,000 miles at the earliest.
Just wondered what other GLC 300 owners think is appropriate.
Yes that is too frequent, some models go from 10 years before changing, I think 5 year interval is still reasonable.
You guys should use the thumbs up instead of replies like these. They just cause readers to open threads for no gain. Sometimes when I see posts like these it makes me think the posters are just trying to up their posting counts (for whatever reason).
You guys should use the thumbs up instead of replies like these. They just cause readers to open threads for no gain. Sometimes when I see posts like these it makes me think the posters are just trying to up their posting counts (for whatever reason).
I know about that. Thumbs up button sometimes work for me sometimes doesn't for me, it has been glitching for me.
I recall answering this exact question you have last year on a different thread but you didn't reply back.
Speaking of bugs, I also notice a certain bug that new threads start showing up with no actual new post. The struggles with outdated vbulletin form engine.
I ended up finding the thread we had the same conversation last year:
https://mbworld.org/forums/glc-class-x254/893069-smartphone-wireless-charge.html#post9164179
Either way, I do apologize for the inconvenience that I have caused.
It's a moot point for me. I switched my GLC300 to a special waterless coolant a couple of years ago. With waterless coolant, you never have to change it because there is no water. Water is what causes the corrosion and you have to change normal coolant because the additives that prevent the water from causing corrosion go bad over time.
The other benefit of waterless coolant is that there is able zero pressure in the system, even at the hottest temperatures. I can drive the car for an hour in 100 deg heat, park and open the hood and when I remove the reservoir cap, it just makes a tiny breadth. The pressure of regular coolant can be 20 to 30 psi in modern cars and that pressure is what blows out water pump seals, radiators, engine oil and transmission heat exchangers, heater cores, rubber hoses and plastic fittings.
The boiling is much higher than coolant and so is the freeze point. Zero downsides. I also send my car oil samples to Blackstone and all the wear indicators are outstanding, so no engine issues at all from waterless coolant. A lot of people will have their own theories as to why waterless coolant can't work, I have heard them all, but I have it in all my cars now for 100's of thousands of miles and about 8 years, so I prefer my actual experience versus their theories. The one I use is Evans.
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