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Discussion Starter #1
got our 1 year old GLC last week. and notice the two headlight has a condensation. Does this happen to anyone else? Does it go away or need to go back to dealer? some people say it will go away over times but is been a week and is still there, any suggestion?
 

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Hi edho and welcome to the forum. No need to worry, this is yet another "characteristic" of Mercedes ownership. In all fairness, your attention is drawn to this phenomenon in the exterior lighting section of the owner's manual:

"Certain climatic and physical conditions may cause moisture to form in the headlamp.This moisture does not affect the functionality of the headlamp."

It will not go away and is obviously still occurring after 1 year, it is just a function of temperature and humidity inside and outside the enclosure. If more people complain perhaps Mercedes will get prospective owners to sign a waiver and recommend the fitting of winter headlights :D :D :D
 

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When I took delivery of mine in late November, the headlights were very fogged up.

The weather where I am is nearly identical to what is was then but there is no longer any fog/condensation. I'm hoping that all the water vapour inside the units has dissipated and I will never see condensation again.

My GLC is my first Mercedes and the first vehicle I have ever owned that has headlights that come with a fogging "feature". My previous vehicles have been Japanese luxury and non luxury brands and none had headlights that would fog up. Including my most recent one that had adaptive LED headlights similar to the GLC.

My guess is that when the headlights were manufactured, moist air was trapped inside. Perhaps they are sealed and that water vapour will never escape and they will fog for life if the lens is cooled below the saturation temperature of the air trapped inside.

I would have hoped that the manufacturer (Osram I believe) would have manufactured the headlights in such a way that they contained air free of water vapour or an inert gas such as Nitrogen.

I don't understand why the suppliers of LED headlights to the Japanese brands are able to manufacture headlights that don't fog whereas the supplier to luxury brand Mercedes (which uses a slogan of "The best or nothing") cannot.

I know I am being picky but I expected the best or nothing when I bought my Mercedes. For me, fogged up headlights is an embarrassing "trait" for my Mercedes to have. Especially when parking beside much cheaper cars that don't have fogged up headlights.
 

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Once it's not enough to cause damage or make the lenses murky, you should be okay. If it does start affecting things like that though or building puddles, get that out!
 

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Discussion Starter #6
Hi Mercnut, I agree with you. paying so much money for a high end car and does not expect the LED light to fog up. and is totally embarrassing in the car park when a same GLC park next to mine and his light are clear. so the fogged up has been gone for couple of days now (thank god) but sometime on a wet day or after we wash the car it appear again. Contact mercedes and they've ask us to bring it in for them to see.
 

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Hi Mercnut, I agree with you. paying so much money for a high end car and does not expect the LED light to fog up. and is totally embarrassing in the car park when a same GLC park next to mine and his light are clear. so the fogged up has been gone for couple of days now (thank god) but sometime on a wet day or after we wash the car it appear again. Contact mercedes and they've ask us to bring it in for them to see.
After a few months (I took delivery of mine in mid November), the lights no longer fog. It could be the weather but I don't think it is as it's pretty much the same as it was in November. I'm hoping that means the water vapour that was trapped inside has has escaped and I'll never see fog again.

If I do, I will take it to my dealer. I suspect they'll just tell me it's normal and refer me to the clause in the manual (that Toobad included in his post).
 

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I had the same problem and my dealership allegedly fixed the problem with Mercedes retro fit parts. They said it was definitely a fault.
 

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Hello,

I just picked up mine yesterday, and today I also noticed the fog in the LED lights.
Hopefully this clears up soon.
 

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I had the same problem with fogged up LED headlights when I picked up my new GLC. The problem cleared itself after three weeks, and has not recurred.
I read in an earlier post that the fogged up headlights were found on a 1-year old GLC. My suspicion is that the headlamps may have been recently replaced.
 

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That's really weird though, why did it get like that in the first place and then clear out and not come back? I mean, what initially caused it to happen to begin with?
 

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Moisture on head light, water on the tail Light

I bought GLC-220D-AMG, (July 2017) when I picked the car it so hapen raining, when I arrive at home I immediately notice the moisture in the car, on the following day I call the dealer, the only explanation made by service manager it is normal in the benz, a week afer I also notice the presence of moisture and worse the is water inside the tail light.
 
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