Thanks Lee, that was all I did too. The repair order says they were able to duplicate the noise, “applied tape to body seams,” and ordered acoustic glass.

Since our GLC’s came over on the same boat, I assume I have the same build complements as you. While I have some noise around my front windows, I have been trying to discern whether it is the noise that MB deems excessive that would allow them to replace the front door windows with acoustic glass. I haven’t been able to tell by reading posts on this thread exactly how annoying and loud the noise actually is. But I’m going to request that they check it out per the TSB.

BTW mtberman, you’re familiar with my thread where I complained about the “buffeting” noise I thought was coming from the rear of my car. Is it possible that’s the wind noise others complain about? It would be great if the acoustic glass got rid of that.

Vaboy, I think it’s worth a shot. When I spoke to the service adviser I said something like “can you please ask the tech to check for wind noise in the front? It sounds like it’s coming from around the mirrors.” They did the rest.

Here’s what the work order said: “Check for wind noise around side windows and outside mirrors at highway speeds.” Under that was the mechanic’s response, “Test drove for wind noise. Duplicated excessive wind noise. As per: LI72.10-P-062500 applied tape to body seams as indicated and test drove again. Noise still present. Ordered acoustic windows.”

Gi it it a try !

Great info, mtberman. Thanks

I’ll ask them to check it out when I take it in for my A service and annual state inspection in the next couple of weeks.

That’s great. I’ve had mine for a couple of weeks now and they definitely make a difference.

Mtberman, glad to hear you got yours installed and they seem to help. Had my car in for my A service recently and they checked for noise using a sonic tester of some sort since it was raining the couple of days they had it. They did NOT drive it at highway speeds. Rather than go through the steps of the TSB (or LI as MB calls them), the Service Mgr simply asked the MB Warranty person he deals with and they told him, if you don’t have Acoustic Glass, you can’t get it through the LI. I told him NOBODY, in the US anyway, gets Acoustic Glass unless it’s an accident. It’s not an Option nor part of any package. Yet lots of folks had the noise improved through use of the LI and the installation of Acoustic Glass in the front side windows. He supposedly opened up some sort of internal trouble/problem ticket that he’s supposed to document something to them with photos or some other crap. I’ve got to take it in for Round 2 of this BS probably this week. I was expecting better from MB AND my dealer.

Sorry to hear it. If they don’t fix it on the second visit, it might be easier to contact MBUSA customer service instead of going back to them again.

I simply told the dealer there was wind noise and, according to the ticket, the tech replicated it on a test drive. From there they followed the bulletin and completed the work, and then followed up a week later to ask if it worked. In fact, today the SA sent a text saying I will be receiving a follow up survey tomorrow and he wanted to be sure I was completely satisfied with their work.

If you call MBUSA, keep it simple and tell them you took the car in for a concern and the dealer failed to fix it. That’s probably all you need to say to get results.

I know I get wordy on here, but the ticket just said “Check for wind noise around both front mirrors”. I never dreamed he’d “check for wind noise” without driving it. And there is no note at all on the ticket showing what they did, as there usually is. He just told me when he called that they “checked it out and didn’t find any excessive noise around any doors or openings.” I’ll escalate to MBUSA if they’re too lazy to troubleshoot it properly.