C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Am I missing something?

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Old Feb 29, 2016 | 12:21 PM
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From: Montreal
C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
Am I missing something?

The floor panel over the spare tire is caving in...Can you tell me if I am missing something to keep the floor level? Thanks for your help, J.P.
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Old Feb 29, 2016 | 12:26 PM
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MB W204/W212, BMW E66, Porsche 958, VW MK6 TDI, Maserati Ghibli SQ4
Floor board isn't really supported fully by the spare, depending rather on it's on rigidity. If it's caving in however, you can try rigging some supports under the spare tire to raise it up a bit so the board can sit on top of it. Just need to make sure it's not so tall that you won't be able to screw on the center utility bracket. I know I've raised mine somewhat this way with my sound dampening liner down there as the boot area under the spare is one of the primary spot for road noise intrusion as there's only a piece of undampened plastic there.

Last edited by AZN Optics; Feb 29, 2016 at 12:30 PM.
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Old Feb 29, 2016 | 12:54 PM
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C350 2010, BMW 325i 2001, Porsche turbo 996 2002.
Thanks for lot for the fast reply and for the information...I will do as you are suggesting! I feel better now that I know I don't miss any part ;-)
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Old Feb 29, 2016 | 02:07 PM
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2013 C250 Sport
Originally Posted by AZN Optics
Floor board isn't really supported fully by the spare, depending rather on it's on rigidity. If it's caving in however, you can try rigging some supports under the spare tire to raise it up a bit so the board can sit on top of it. Just need to make sure it's not so tall that you won't be able to screw on the center utility bracket. I know I've raised mine somewhat this way with my sound dampening liner down there as the boot area under the spare is one of the primary spot for road noise intrusion as there's only a piece of undampened plastic there.

How much of a difference did that make?
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Old Feb 29, 2016 | 03:47 PM
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Originally Posted by michail71
How much of a difference did that make?

You mean with the sound dampening? Quite a bit, especially if you've upgraded your exhaust like I did. I affixed vibration dampeners (http://store.secondskinaudio.com/damplifier-pro/) and layered sound dampening layer on top (http://store.secondskinaudio.com/luxury-liner-pro/).

If you ever take out the spare, you'll see there's just a thin plastic piece between the outside and your interior. We pinpointed that as the primary culprit for cabin noise.
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Old Feb 29, 2016 | 10:27 PM
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Now if only someone could figure out how to dampen that engine whine on the C250! It has to be the worst sounding production engine ever made. Although I suspect it's something belt, pulley or gear related.

Any thoughts on which material had the biggest impact?

If I do this I'll try to get some before and after dB readings.

Last edited by michail71; Feb 29, 2016 at 10:38 PM.
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