sound proofing trunk

Old Jun 23, 2019 | 07:16 AM
  #1  
citizensane's Avatar
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Merc CLS550
sound proofing trunk


I am trying to kill some of the road and exhaust noise I believe primarily is coming from my trunk (2104 CLS 550). A year ago I did the resonator delete mod--but still think it's a bit to loud. Inspired by "Virtual Rain's" project (attached image) who sought to do the same thing (see photo)--------I installed the Noico film yesterday. BUT--I don't think it dampened the sound at all.
Wondering what other measures I can take to isolate the sound to the trunk. I am imagining having a custom cover / trunk liner made to just lay over the trunk floor--OR--even applying a sound barrier to the backs of the fold down
rear seats (somehow)
Looking for ideas--photos--direction from others who have attempted this. Sent a PM to Virtual Rain--but no reply--maybe he sold his ride--not sure
THANKS !!!
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Old Jun 23, 2019 | 06:31 PM
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Drewsky00's Avatar
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Hmmm, I was about ready to get started doing the same based on earlier reports that lining the trunk like that made a substantial difference in noise. Did it really not help all that much?? I think I'll lurk and wait for some more feedback before proceeding....
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Old Jun 23, 2019 | 07:57 PM
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I can't see the cross-section of the material you have put on, but if it is solid or near-solid, it won't absorb the tire and road noise. Those applications (like DynaMat, etc) are good to dampen vibrations that actually vibrate the panel itself (like when you have added a large sub-woofer and amp), but they do not reduce other road and ambient noises.

In my E400, I simply lined the spare tire well with fiberglass insulation such as the pink fluffy stuff they put inside walls of buildings. I took out the spare tire and laid down a layer of the stuff, covering the entire floor and sides. I then put the tire back into place and put another layer of insulation over the tire. Then I just closed the floor panel over the whole mess. This made a HUGE difference, greatly reducing the exhaust and road noise entering the cabin.
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Old Jun 24, 2019 | 04:17 AM
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thanks--that's probably my next move
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Old Jun 24, 2019 | 04:18 AM
  #5  
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believe me--it's a waste of time and money
but Steve E400's idea looks cheap and easy
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