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Old 07-16-2000, 05:10 PM
Posts: n/a
My window on the back of my 89 420 SEL looks like it is fogged up on the corner(white substance between the glass). It looks
like "mist" has gotten into the glass, what is it????

How do I get rid of it? Thanks for your time and advice.

Michael Jay
1989 420 SEL
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Old 07-16-2000, 05:29 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
DOT AS2 glass is shatter resistant. It is made by laminating two section of glass with a clear plastic membrane between. The clouding occurs where the glass is separating and there isn't much you can do about it.
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Old 07-16-2000, 05:34 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
You may be able to present this to your insurance company as a safety issue, ie visibility..who knows maybe they'll spring for a new piece of glass. This depends of course on how you local safety inspections view this type of problem. it will only get worse with time.

Jeff Lawrence
1987 300e
1989 300e
1987 BMW 325
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Old 05-14-2003, 09:09 AM
Join Date: Apr 2003
Location: NB Canada
Posts: 1,173
White areas on rear window corners

I posted a reply to another thread before finding this one, but my question is this: is this glass separating, or is it the ultraviolet light from the sun discoloring the plastic laminate? Why would the glass separate? I've never seen this on any other car except Mercedes. I'm not going to invest in a new window that will just repeat the flaw again. Could I inject something into the corners, like the stuff they use to fix chips, if the problem is separation? If it's light-related, can the process be reversed?
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Old 05-14-2003, 01:20 PM
MikeTangas's Avatar
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
The two panes of glass are separating. The white in the corners is the mark of delamination.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

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Old 05-14-2003, 03:28 PM
Join Date: Apr 2003
Location: NB Canada
Posts: 1,173
Well, that's 2 votes for separating glass, so that is the problem. Now, has Mercedes offered a recall on this, as it sure looks like a manufacturing defect? As I said, I've heard of this, have seen it before, and have had 2 Mercedes myself that have this problem, but never on any other make. Anyone know where I can get more info?
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Old 05-14-2003, 05:22 PM
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Join Date: Jul 2002
Location: Trenton, NJ
Posts: 248
I'll add my vote for the separation of the glass layers.

As for this being only on MB - just visit any salvage yard with early 1970's vintage or earlier cars - you'll see lots of it. In fact, if you go to a lot of car shows, you'll even see it on some vehicles that aren't yet fully restored.

Just my .02

'87 560SEL 267K (177K on motor) Blue/Blue
'98 Buick LeSebre 60K (wife's car)
'56 Imperial Sedan 124K
Past Cars:
'67 Dodge Monaco 130K (Sold)
'87 Chrysler 5th Ave 245K and going strong (sold)
'73 Plymouth Satillite 175K (sold)
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Old 05-14-2003, 09:26 PM
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Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
Both of my slcs have this problem in the rear windows. I think it comes from the fact that there are defoster strips in the windows. The wires from these strips come out around the bottom and top edges where they connect to a copper strip. The bottom strip is connected to the wire that goes through the body to the electrical system. I think that where these wires come out of the window allows air to get in which may allow the sun to discolor the laminant between the two sheets of glass. Aside from replacing the window for a cool $1,600 I think that there is little that can be done.
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Old 05-15-2003, 08:17 AM
Join Date: Apr 2003
Location: NB Canada
Posts: 1,173
More info on the dreaded 'white haze'

OK, I did some digging and found this authoritative piece (sorry, I lost the source):
"Edge effects that can result from a combination of factors are known as edge blush, discoloration, and delamination. Edge blush is the whitish haze that will develop between the two lites of glass after prolonged and excessive exposure to water. Usually this is seen if the glass has not been properly stored prior to installation or if moisture is allowed to enter the glazing frame and proper weep systems are not provided. Edge blush is easily visible and consumes a larger area than most any other edge effect in laminated glass. The area affected will be altered depending upon environmental conditions and may appear to "vanish" during dry climate while re-appearing during times of high humidity. Edge blush usually can be traced to an edge origin or isolated in a location which the PVB has been exposed and can absorb moisture over time"
What the OP is referring to, then, is 'edge blush', which is likely moisture (effect is usually lower corners) creeping into the laminate adhesive (PVB), rather than delamination. If so, I wonder if there is a way to get the moisture out?
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Old 05-16-2003, 04:50 AM
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Join Date: Jun 2002
Location: Melbourne, Australia
Posts: 80
Talking edge blush

Seen many of these on Benzs mostly about 15 years old or more and usually on W124s. I steer clear of these when looking to buy these cars as the salesman will usually say that theres nothing wrong with the rear windows, just some window stains which will probably wash off easily, not to worry about them. They won't tell you that it cannot be washed off ever and how much it would cost to have it replaced and they won't do it just for the sale unless you pay for it. Just saw these when I was out looking for a W124 and went to car yards as well as at a repair shop which sells spareparts as well as some used cars too. Ended up buying a W202 instead and because this model is a lot younger( 8 years).
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Old 05-17-2003, 11:44 PM
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You will rue this day...
Join Date: May 2003
Location: NW Arkansas
Posts: 732
Lightbulb Yet more de-lamination stuff

I own a w126, 1983 380 SEL which is also suffering from de-lamination. I was told by the person who sold it to me what it was, but not how serious it was. I spoke to my MB specialist, and they said that it has to be replaced, because it will eventually separate to the point where it not only becomes hazardously opaque, but could shatter at some point in its life.

Why did I buy the car you might ask? Because it was a steal at $3888, @ 196k miles and had been owned by people with MD and PhD following their names... It is absolutely immaculent, save for some paint chips (somebody probably got too close to a dump truck).

I hope you find a low-cost replacement. Does anyone know if you can find OEM replacements that say "Made in West Germany?" That would be cool.

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