katiesdad7

Has anyone had a successful fix for this problem? Mine is going in again tomorrow for this and was hoping someone had it repaired so I can tell the dealer.

They still insist they never heard of this problem.

YYZ-E55

What are the prerequisites? Sunroof fully open and all windows closed, or...?

Pano roof or standard sunroof?

GregW / Oregon

As has been posted elsewhere, it is apparently with everything closed up and happens in a very short speed band aroujnd 45 mph. The description sounds like a sound pressure wave inside the cabin. Only some vehicles seem to be affected.

https://mbworld.org/forums/new-m-cla...tion-45-a.html

http://www.benzworld.org/forums/w166...ing-noise.html

YYZ-E55

Crazy - I don't recall seeing those posts. I hope they get it fixed for you!

TundraRoads

My initial thought was that it seemed like a build up of air pressure, but the two most recent times I kept it going for a bit and now am wondering if it's a low resonance problem, like maybe a bearing or something. The lower the frequency the less directional the sound is and the more it is simply felt rather than heard (I use to be a sound engineer and we'd sometimes get newbies to take a seat on a subwoofer for a chat and then put an 11 hz mod tone in it. Most lasted about 90 seconds before rushing to the can).

krazyvshank

Hope they fix this in MY2013

katiesdad7

I doubt it considering MB doesn't even acknowledge it is a problem. According to MB it is "normal". So its reasonable to assume that they wouldn't fix something they don't consider broken.