"rings" in rear window
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From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
"rings" in rear window
When my rear window fogs over, I notice several rings or circles on it. No particular pattern. When window is clear, no rings. Window has been cleaned inside and out.
Asked dealership service writer about it and he replied that it is normal. Part of the manufacturing process and is in the glass.
Anybody ever heard of this? Have owned many cars and none has ever had rings in rear window at any time. Last several have had rear window defoggers.
Asked dealership service writer about it and he replied that it is normal. Part of the manufacturing process and is in the glass.
Anybody ever heard of this? Have owned many cars and none has ever had rings in rear window at any time. Last several have had rear window defoggers.
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Joined: Oct 2009
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2010 E550
I have the exact same thing on mine... I figured it was left over residue from the suction cups during the installation or something. I've tried to clean inside and out a few times, but they are still present. Faint, like you say, but definitely there.
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From: Florida
2011 GL450 P2, Appearance Pkg, Leather. 2012 C250, P1, Sport, AMG Wheels, Panorama Sunroof.
I had that problem on my gl-450. I was able to get the rings out by using glass cleaner with a combination of newspaper and handtowels.
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2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
I used Girot's Garage Fine Glass Polish to remove the rings. This product is also very good for removing hard water deposits and other junk that seems to adhere to the windshield.
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Porsche 991S, Cayenne S, 1972 BMW 3.0CS E9 Coupe
Are you sure you aren't just seeing the quench marks that are in all heat strengthened and tempered glass. They look like rings all over and sometimes shift in color.
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Thread Starter
MBWorld Fanatic!
Joined: Nov 2009
Posts: 2,616
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From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
What the service advisor said
I have cleaned the inside window several times with window cleaners. Outsides get cleaned at least every two weeks-I'm a nut about having clean windows.
Funny I have never seen it in other cars, but guess it is OK.
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Porsche 991S, Cayenne S, 1972 BMW 3.0CS E9 Coupe
The service advisor said the same thing when I suggested they were lift ring marks. In fact, he said when he has seen the same thing on other windows in his own MB.
I have cleaned the inside window several times with window cleaners. Outsides get cleaned at least every two weeks-I'm a nut about having clean windows.
Funny I have never seen it in other cars, but guess it is OK.
I have cleaned the inside window several times with window cleaners. Outsides get cleaned at least every two weeks-I'm a nut about having clean windows.
Funny I have never seen it in other cars, but guess it is OK.
EDIT: pdf file didn't load for some reason. I guess it's too big. Go to Pilkington's (automotive glass for Mercedes, BMW, etc.) website and search for tech bulletin ATS -157 (2007-07-25)
Last edited by 220S; Nov 20, 2010 at 03:18 PM.
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From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
Maybe this will help explain the phenomenon to you. There's even a photo example: "Typical dot quench pattern seen in a tempered Mercedes automotive back window when incoming light is reflected from the sky, especially when the sun is not directly shining on the glass."
EDIT: pdf file didn't load for some reason. I guess it's too big. Go to Pilkington's (automotive glass for Mercedes, BMW, etc.) website and search for tech bulletin ATS -157 (2007-07-25)
EDIT: pdf file didn't load for some reason. I guess it's too big. Go to Pilkington's (automotive glass for Mercedes, BMW, etc.) website and search for tech bulletin ATS -157 (2007-07-25)
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Joined: Oct 2010
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
The service advisor said the same thing when I suggested they were lift ring marks. In fact, he said when he has seen the same thing on other windows in his own MB.
I have cleaned the inside window several times with window cleaners. Outsides get cleaned at least every two weeks-I'm a nut about having clean windows.
Funny I have never seen it in other cars, but guess it is OK.
I have cleaned the inside window several times with window cleaners. Outsides get cleaned at least every two weeks-I'm a nut about having clean windows.
Funny I have never seen it in other cars, but guess it is OK.
I have not seen rings in my car but if there are any they probably are from installation "lift sucker cups".
These rings are on the OUTSIDE of the glass (obviously assembly "robot" is on the outside of the car) and will not come off without mechanical, sometimes heavy, rubbing with good window cleaner. They will NOT come off during normal automatic washing and even normal hand washing usually does not remove them.
Thread Starter
MBWorld Fanatic!
Joined: Nov 2009
Posts: 2,616
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From: Southeastern USA
2010 E350 Luxury Sedan, Engine 272 (V6)
Doubt lift rings
I have not seen rings in my car but if there are any they probably are from installation "lift sucker cups".
These rings are on the OUTSIDE of the glass (obviously assembly "robot" is on the outside of the car) and will not come off without mechanical, sometimes heavy, rubbing with good window cleaner. They will NOT come off during normal automatic washing and even normal hand washing usually does not remove them.
These rings are on the OUTSIDE of the glass (obviously assembly "robot" is on the outside of the car) and will not come off without mechanical, sometimes heavy, rubbing with good window cleaner. They will NOT come off during normal automatic washing and even normal hand washing usually does not remove them.
Problem is have only seen them when glass fogged over, which has been rare.
