Acoustic Glass, Driver/Passenger Doors
Junior Member
Joined: Nov 2016
Posts: 67
Likes: 4
MB GLC
Have acoustic glass installed and did a sound test:
Idel: 37db
60mph on smooth asphalt: 57db
60mph on rough pavement: 60db
25mph and acceleration at 3k rpm: 45db
These numbers are not bad for an SUV but still not at Lexus ES350 levels.
Idel: 37db
60mph on smooth asphalt: 57db
60mph on rough pavement: 60db
25mph and acceleration at 3k rpm: 45db
These numbers are not bad for an SUV but still not at Lexus ES350 levels.
Junior Member
Joined: Sep 2016
Posts: 53
Likes: 4
From: Coquitlam, BC, Canada
2017 GLC 300 4MATIC (formerly: 2010 Lexus RX 350 & 2013 Mercedes-Benz B250)
Super Member
Joined: Nov 2014
Posts: 531
Likes: 86
From: Dallas
'20 GLE450; '06 CL65
My '43 is still on the boat, scheduled for delivery at Baltimore port on Friday. Got my VIN and pulled the option codes. I have a code 840 (privacy glass) but no 851. Called my SA, told him what I found out about the car not having 851 and gave him bulletin number. Although I have to take delivery first and then open a complaint, the materials according to the tsb have been ordered and will be waiting for install when I take it back in to open the complaint. The build date was Feb 9.
Just seems odd the random nature of it; whether a car has the acoustic glass or not. In US, it is not on the order sheet online, nor on the DOG, as I sat with my salesman while we spec'd the order from beginning to end, line by line. I pretty much got every option except exterior carbon fiber stuff, heated rear seats/steering wheel and HUD. I have the P3 package and even the designo black interior. So I don't think it's a package issue, at least not in the US with the '43. Go figure.
So, anyway, whether the acoustic glass is a big deal or not, thanks forum members for shining a light on this.
Just seems odd the random nature of it; whether a car has the acoustic glass or not. In US, it is not on the order sheet online, nor on the DOG, as I sat with my salesman while we spec'd the order from beginning to end, line by line. I pretty much got every option except exterior carbon fiber stuff, heated rear seats/steering wheel and HUD. I have the P3 package and even the designo black interior. So I don't think it's a package issue, at least not in the US with the '43. Go figure.
So, anyway, whether the acoustic glass is a big deal or not, thanks forum members for shining a light on this.
Last edited by Skizz; Mar 1, 2017 at 08:56 PM.
Member
Joined: May 2012
Posts: 159
Likes: 11
From: B.C. Canada
SL500, GLC300
i have the acoustic glass on the drivers and passengers front windows, but my windshield doesn't say it is acoustic. does anyone's windshield say that? and what about anyone with the head-up display?
Junior Member
Joined: Sep 2016
Posts: 53
Likes: 4
From: Coquitlam, BC, Canada
2017 GLC 300 4MATIC (formerly: 2010 Lexus RX 350 & 2013 Mercedes-Benz B250)
Replacement Windshield - Acoustic Glass?
I had my windshield replaced three weeks after taking delivery because of stone chip damage (thanks, I-5 in Washington state!). I neglected to check the original windshield for an "acoustic glass" marking before it was replaced. However, the replacement windshield was ordered through the local M-B dealership's parts department by supplying my car's VIN, which the dealer cross-referenced to get the replacement windshield's part number.
After installation, I could not find any "acoustic glass" marking on the new windshield. Now I don't know whether the original windshield and the replacement windshield are different, or the same.
In the dealership's showroom, I checked the windshield on a GLC, and it did indeed have "acoustic glass" marked on it.
Back to the parts desk - I asked the parts guy to look up the part number for my VIN, and it matched the replacement windshield I got. He assured me that was the proper, and only, replacement part for that VIN. One possible conclusion is that an "acoustic glass" replacement windshield is not available, at least, in Canada. Or maybe - the replacement windshield is "acoustic glass", but lacks the marking.
I asked the parts guy to look up the replacement part number for the GLC in the showroom with the "acoustic glass" windshield (using that car's VIN). The replacement part is the same as the one I got for my car.
Oh, well.
Last edited by BCRCornet; Mar 2, 2017 at 12:23 AM.
Member
Joined: Mar 2016
Posts: 96
Likes: 18
From: Spain
MB GLC43 AMG
My driver's and passenger's front windows do have "acoustic glass" marked on the logo.
I had my windshield replaced three weeks after taking delivery because of stone chip damage (thanks, I-5 in Washington state!). I neglected to check the original windshield for an "acoustic glass" marking before it was replaced. However, the replacement windshield was ordered through the local M-B dealership's parts department by supplying my car's VIN, which the dealer cross-referenced to get the replacement windshield's part number.
After installation, I could not find any "acoustic glass" marking on the new windshield. Now I don't know whether the original windshield and the replacement windshield are different, or the same.
In the dealership's showroom, I checked the windshield on a GLC, and it did indeed have "acoustic glass" marked on it.
Back to the parts desk - I asked the parts guy to look up the part number for my VIN, and it matched the replacement windshield I got. He assured me that was the proper, and only, replacement part for that VIN. One possible conclusion is that an "acoustic glass" replacement windshield is not available, at least, in Canada. Or maybe - the replacement windshield is "acoustic glass", but lacks the marking.
I asked the parts guy to look up the replacement part number for the GLC in the showroom with the "acoustic glass" windshield (using that car's VIN). The replacement part is the same as the one I got for my car.
Oh, well.
I had my windshield replaced three weeks after taking delivery because of stone chip damage (thanks, I-5 in Washington state!). I neglected to check the original windshield for an "acoustic glass" marking before it was replaced. However, the replacement windshield was ordered through the local M-B dealership's parts department by supplying my car's VIN, which the dealer cross-referenced to get the replacement windshield's part number.
After installation, I could not find any "acoustic glass" marking on the new windshield. Now I don't know whether the original windshield and the replacement windshield are different, or the same.
In the dealership's showroom, I checked the windshield on a GLC, and it did indeed have "acoustic glass" marked on it.
Back to the parts desk - I asked the parts guy to look up the part number for my VIN, and it matched the replacement windshield I got. He assured me that was the proper, and only, replacement part for that VIN. One possible conclusion is that an "acoustic glass" replacement windshield is not available, at least, in Canada. Or maybe - the replacement windshield is "acoustic glass", but lacks the marking.
I asked the parts guy to look up the replacement part number for the GLC in the showroom with the "acoustic glass" windshield (using that car's VIN). The replacement part is the same as the one I got for my car.
Oh, well.
(can't get the page to load up... but found the picture in google)
Junior Member
Joined: Sep 2016
Posts: 53
Likes: 4
From: Coquitlam, BC, Canada
2017 GLC 300 4MATIC (formerly: 2010 Lexus RX 350 & 2013 Mercedes-Benz B250)
Thanks for the tip - the photo applies to the side window glass. My problem is the windshield: any suggestions on how I can tell if the windshield is acoustic glass if it doesn't say so on the logo?
Member
Joined: Mar 2016
Posts: 96
Likes: 18
From: Spain
MB GLC43 AMG
I may be wrong... but never heard about the windshield being acoustic nor an option for that.... When I ordered mine they told me that the front side windows were acoustic...
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Junior Member
Joined: Nov 2016
Posts: 67
Likes: 4
MB GLC
Just a reminder guys -- Altho the acoustic windshield may help reduce the noise, i found it is less strength than regular glass.
My windshield had the weird "twin chips" -- meaning there are 3 places where there are two chips about 3 mm apart, what looks like caused by 1 stone hit.
All things have goods and bads. Even if you got all front windows and windshield replaced with acoustic glass, the car still has fair amount of noise in it. - To me, the insulation in doors is not as good as GLK. Also the run-flat tires are big source.
So if you really want a quiet car, don't pay attention to acoustic glass -- go get the tires replaced with regular tires.
My windshield had the weird "twin chips" -- meaning there are 3 places where there are two chips about 3 mm apart, what looks like caused by 1 stone hit.
All things have goods and bads. Even if you got all front windows and windshield replaced with acoustic glass, the car still has fair amount of noise in it. - To me, the insulation in doors is not as good as GLK. Also the run-flat tires are big source.
So if you really want a quiet car, don't pay attention to acoustic glass -- go get the tires replaced with regular tires.
Junior Member
Joined: Sep 2016
Posts: 53
Likes: 4
From: Coquitlam, BC, Canada
2017 GLC 300 4MATIC (formerly: 2010 Lexus RX 350 & 2013 Mercedes-Benz B250)
This is the logo on my replacement windshield.
This is the logo on the windshield of the GLC in the dealer's showroom.Maybe only windshields installed at the factory are marked with the "acoustic glass" logo, and replacement windshields lack the logo, but are nevertheless "acoustic glass" anyway?
Member
Joined: Jul 2008
Posts: 213
Likes: 31
From: SW Florida
1995 SL500 - 2017 AMG GLC 43
(Please click on the thumbnails below to see the fullsize image.)
Attachment 349990 This is the logo on my replacement windshield.
Attachment 349989 This is the logo on the windshield of the GLC in the dealer's showroom.
Maybe only windshields installed at the factory are marked with the "acoustic glass" logo, and replacement windshields lack the logo, but are nevertheless "acoustic glass" anyway?
Attachment 349990 This is the logo on my replacement windshield.
Attachment 349989 This is the logo on the windshield of the GLC in the dealer's showroom.
Maybe only windshields installed at the factory are marked with the "acoustic glass" logo, and replacement windshields lack the logo, but are nevertheless "acoustic glass" anyway?
Member
Joined: Mar 2013
Posts: 213
Likes: 29
From: Pennsylvania
2016 GLC300 4Matic
My understanding is that HUD (code 463) is always automatically bundled with the acoustic windshield; however, acoustic side windows are not included unless "acoustic glazing" (code 851) is also on the build order.
Supposedly, code 851 includes both acoustic windshield and side windows. The absence of acoustic labeling on some windshields certainly confuses things, but that doesn't necessarily mean these windshields are not acoustic. Of course, we can't be assured that the code requirements are always uniformly applied during assembly. Glass supplies on hand probably dictate to some extent which type of glass gets installed. Considering code 251 is/was a no-cost option in the U.S. -- with no buyer input possible -- I suppose that gives/gave M-B some freedom to keep the assembly lines moving. Strictly my opinion.
Supposedly, code 851 includes both acoustic windshield and side windows. The absence of acoustic labeling on some windshields certainly confuses things, but that doesn't necessarily mean these windshields are not acoustic. Of course, we can't be assured that the code requirements are always uniformly applied during assembly. Glass supplies on hand probably dictate to some extent which type of glass gets installed. Considering code 251 is/was a no-cost option in the U.S. -- with no buyer input possible -- I suppose that gives/gave M-B some freedom to keep the assembly lines moving. Strictly my opinion.
Super Member
Joined: Nov 2014
Posts: 531
Likes: 86
From: Dallas
'20 GLE450; '06 CL65
The thing that gets confusing is that, at least in the US market, option code 851 (for acoustic glass or glazing) is not an orderable option. In other words, there is no box to check for it like there is, say, the HUD option or heated/ventilated seats. As I was ordering mine, I was aware of this issue and looked for it with my dealer while we were placing the order. It just wasn't there as an option. So, what happens? Mine does not have it on the build sheet, even though I have damn near every other orderable option. So, I had my contact at the dealer pre-order the 851 front side glass as stipulated in the TSB so it will be there when I open a noise complaint, also as stipulated in the TSB. I'm sure, however, that I won't have the acoustic windshield glass.
Ultimately it is probably not a huge deal. I just find the screwiness and random nature of it irksome, even if it is a supply issue. MB should own it and have factual information on it at the dealer level, IMHO. Generally speaking, the dealer has no idea what this is all about.
Ultimately it is probably not a huge deal. I just find the screwiness and random nature of it irksome, even if it is a supply issue. MB should own it and have factual information on it at the dealer level, IMHO. Generally speaking, the dealer has no idea what this is all about.
MBWorld Fanatic!
Joined: May 2008
Posts: 2,236
Likes: 162
From: DFW
2022 E350 Diamond White Metallic, 2016 GLC300 Dakota Brown Metallic
Originally Posted by BCRCornet
(Please click on the thumbnails below to see the fullsize image.)
Attachment 349990 This is the logo on my replacement windshield.
Attachment 349989 This is the logo on the windshield of the GLC in the dealer's showroom.
Maybe only windshields installed at the factory are marked with the "acoustic glass" logo, and replacement windshields lack the logo, but are nevertheless "acoustic glass" anyway?
Attachment 349990 This is the logo on my replacement windshield.
Attachment 349989 This is the logo on the windshield of the GLC in the dealer's showroom.
Maybe only windshields installed at the factory are marked with the "acoustic glass" logo, and replacement windshields lack the logo, but are nevertheless "acoustic glass" anyway?
MBWorld Fanatic!
Joined: Nov 2001
Posts: 1,148
Likes: 16
From: Berkshire, UK
2004 SL55, 2015 A250d, 2016 GLC250d
Richard
