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  #1  
Old 03-11-2016, 01:19 PM
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Glass thickness change in W123

I seem to remember reading that the thickness of the glass changed over the production run of the 123 body.

When did it change? Did it get thicker or thinner? Will the glass from a 79 fit in an 84?

Thanks!

W.
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  #2  
Old 03-11-2016, 10:25 PM
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If you're referencing the glass in the doors, I have glass from an 83 and an 85 which I can put a caliper on in the morning when it's light out.
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  #3  
Old 03-12-2016, 08:03 AM
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Door glass thickness is 3.2mm for both the 83 and the 85 glass. I have a PPG driver side window as well which is 3.9mm.
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Old 03-12-2016, 08:52 AM
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I'm not aware of any change.
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  #5  
Old 03-12-2016, 11:42 AM
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From what I understand, the U.S. glass was different than the European glass. I have read something about that in regards to the windshield seals. I'm no expert but my reading has indicated that. It may or may not be correct. I always heard that the glass, lights, etc had to be changed if you brought cars over years ago.
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Old 03-12-2016, 04:55 PM
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I've been driving benzes for a long time and have never heard or seen that.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #7  
Old 03-12-2016, 06:22 PM
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I've heard that the glass thickness changed on the W123.
There is a part number change 09/79 for the side windows, but windshield and rear window remain the same.
I'm assuming they got thicker but I do not know for sure.
Edit: Thanks charmalu. My assumption was wrong!

Last edited by Rick76; 03-12-2016 at 06:46 PM.
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Old 03-12-2016, 06:37 PM
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The side window glass 77 - 79 ( as Rick mentioned 09-79) is a thicker glass than
80 - 85 which was made a bit thinner.
Also as I understand it, the curvature is different, and the window channel is a different part #.

If you look in the vendor catalogs for the W123 side window glass, they show only one part #.

I personally have not measured the glass. My buddy had his side window broken in his 79. I told him to grab one from PNP.
He did some researching, called Roy (Whunter) and Roy told him of the differences.

MB probably went to thinner glass to lighten up the cars where they could, to appease the EPA or what ever Govt. agency, in a effort for better mileage.
Just a guess on my part,


Charlie
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Old 03-12-2016, 06:40 PM
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I think we need someone to go measure the glass on their 79.
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  #10  
Old 03-12-2016, 10:04 PM
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I just remember reading that the Euro rear and front seals were different. As the car is the same, I can only guess that this was the issue. I haven't replaced my seals yet but I did read that the Euro seal wasn't the same as the cd seal.

This is to say that the CE seals used on the cars overseas were supposedly different than the CD seals. I didn't mean to suggest that the front was different than the rear. That's a given.

Last edited by wstetson3; 03-12-2016 at 10:16 PM. Reason: clarification
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  #11  
Old 03-13-2016, 10:08 AM
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Thanks for the comments! Sounds like if I pull the glass for use in my 84, I need to pull the window guides as well.

And a hearty thanks to all who contribute to this forum. With out all the shared knowledge here, it would be difficult to continue to keep these older treasures running!

W.
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  #12  
Old 03-13-2016, 12:28 PM
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Quote:
Originally Posted by wstetson3 View Post
I just remember reading that the Euro rear and front seals were different. As the car is the same, I can only guess that this was the issue. I haven't replaced my seals yet but I did read that the Euro seal wasn't the same as the cd seal.

This is to say that the CE seals used on the cars overseas were supposedly different than the CD seals. I didn't mean to suggest that the front was different than the rear. That's a given.
Its a little hard to be sure what your meaning is. If you are saying that a CE or CD seal for a euro model is different than the same body in a us spec. I doubt that.

Of course you probably know the Coupe front and rear glass is different than a sedan. The roofline on the coupe is 2" shorter, noticable when you sit behind the wheel, by the cushion being lower and the wheel relatively higher, and the outside mirrors and sun visors are different as well.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #13  
Old 03-13-2016, 02:04 PM
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Well, the CD is a North American car only and the part number for the front and rear seals for the CD is different from the part numbers for the CE cars in Germany. From what I read, there is a fitment issue. I think we will all agree that they didn't make two different coupes so one can only assume that the glass was different IF the information I got was correct. As with most things, this is what I read, not what I have seen first hand.

I'll find out soon enough. My coupe (CD) will have the glass and seals installed this summer if I have any luck at all and get enough work done. I removed the seals so the car can be painted. If I didn't have such a solid coupe, I would sell it and buy a sedan.
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  #14  
Old 03-13-2016, 06:36 PM
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Euro and US may have different glass thickness because many Euro cars used tempered glass windshields, while laminated glass was required in the US.
However, this won't explain any difference in the other glass.
Now perhaps, if tinted glass was standard on US models, but optional in Europe, that could also explain some of the different part numbers.

Happy Motoring, Mark
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