Mercedes-Benz Forum banner

1 - 8 of 8 Posts

·
Registered
'85 W123 230E
Joined
·
3 Posts
Discussion Starter #1
Hi all, long time lurker first time poster. My rear window on my W123 has started to bubble and yellow for a while now, anyone experienced anything similar? Any idea on what is happening and how I should fix this as it makes the rear of the car look horrible. Cheers
 

Attachments

·
Registered
Joined
·
36 Posts
Automobile glass professionals who I've encountered over the years have referred to the phenomenon you are describing and showing as "delaminating". I think I have seen it on every W123 I've encountered, including the couple of my own. Seems to be a rather common occurrence with age, like skin wrinkles showing up as one makes one's way through life.
 

·
Registered
W123 230E
Joined
·
13 Posts
I am no expert on these cars, but I do work in the glass industry and my first thought was that it looked like delamination.
My understand is that the front glass is laminated but the rear glass is not, if I have that correct then it is something other than delamination.

It looks like the trace heater wires are laid onto the inside of the glass and then protected by a thin film of resin or film of some sort and it looks like it is this that is breaking down, I expect through a combination of age, UV damage and possibly moisture.
 

·
Registered
1980 280E Sedan
Joined
·
25 Posts
Mine has the some problem and I think Spudfather may be on the right track. I suspect UV is the culprit. I have an exterior mounted decal which partially conceals mine.
 

·
Registered
'85 W123 230E
Joined
·
3 Posts
Discussion Starter #5
I am no expert on these cars, but I do work in the glass industry and my first thought was that it looked like delamination.
My understand is that the front glass is laminated but the rear glass is not, if I have that correct then it is something other than delamination.

It looks like the trace heater wires are laid onto the inside of the glass and then protected by a thin film of resin or film of some sort and it looks like it is this that is breaking down, I expect through a combination of age, UV damage and possibly moisture.
Yeah that seems to be the case, feels sticking to the touch from the inside of the car
 

·
Registered
1982 300D Turbodiesel (US Spec)
Joined
·
135 Posts
That is caused by moisture entering the seal window channel. The seal or sealant are giving up and allowing water to collect between the glass and the seal. The only way to fix it properly is by replacing the seal and window.

If the seal isn’t cracked, you can stop it from getting worse by having the seal re caulked.

All C107, W116, W126 and C123 all suffer from this problem.

By the way, if the seal is leaking, it may be allowing water inside the trunk and under the parcel shelf. It’s a matter of time before it begins rusting.
 
1 - 8 of 8 Posts
Top