Go Back  MBWorld.org Forums > Mercedes-Benz Sedans > E-Class (W212)
Soundproofing doesn't look right inside bluetec engine compartment >

Soundproofing doesn't look right inside bluetec engine compartment

Notices
E-Class (W212) 2010 - 2016: E 350, E 550

Soundproofing doesn't look right inside bluetec engine compartment

 
Old 07-26-2015, 09:11 PM
  #1  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC
Soundproofing doesn't look right inside bluetec engine compartment

Notice that the sound proofing material is not under the rubber molding on the right side of the engine. Is this normal? I am going to an extreme degree to kill all sources of outside noise and when checking the seals under the hood I noticed this.

It looks like the felt-like material that is jutting out was at one point fastened in to the metal backing but overtime it has worked it's way out.
Attached Thumbnails Soundproofing doesn't look right inside bluetec engine compartment-imag0862.jpg  
Carpenter Maass is offline  
Old 07-26-2015, 09:58 PM
  #2  
MBWorld Fanatic!
 
thefisch's Avatar
 
Join Date: Mar 2014
Location: West Central Florida
Posts: 3,071
Liked 302 Times in 261 Posts
2011 E550 P2 4M Sedan
I have this issue on my car also. Check the stick for service bulletins. That's where I found this. See if it applies to your car. Should be covered by warranty.

Deformation of engine compartment soundproofing due to water ingress. LI62.25-P-056043 defective seal. Install optimized seal part # 2126280800.
thefisch is offline  
Old 07-27-2015, 10:55 PM
  #3  
Senior Member
 
Trancebolt's Avatar
 
Join Date: Apr 2014
Location: California
Posts: 268
Liked 6 Times in 6 Posts
w212 E350 Bluetec & Mk7 GTI Sport
Forgive me but im entirely not able to see what you mean. I have this car too, and I notice engine noises but maybe im just used to it.... I62.25-P-056043 huh ? I have had my car at the dealership twice this year youd think theyd look but not unless you say something. Id love to read the chronicle of your soundproofing if its not already a thread.
Trancebolt is offline  
Old 07-27-2015, 11:01 PM
  #4  
Junior Member
 
Join Date: Jul 2015
Posts: 49
Likes: 0
Liked 4 Times in 4 Posts
2012 E350 Bluetec & 2013 S550
Can you put a circle or arrow to the affected area? I'm having a hard time identifying what you are describing. I can check it against my E350BT.

Greg
gcssat is offline  
Old 07-27-2015, 11:06 PM
  #5  
MBWorld Fanatic!
 
thefisch's Avatar
 
Join Date: Mar 2014
Location: West Central Florida
Posts: 3,071
Liked 302 Times in 261 Posts
2011 E550 P2 4M Sedan
Originally Posted by Trancebolt View Post
Forgive me but im entirely not able to see what you mean. I have this car too, and I notice engine noises but maybe im just used to it.... I62.25-P-056043 huh ? I have had my car at the dealership twice this year youd think theyd look but not unless you say something. Id love to read the chronicle of your soundproofing if its not already a thread.
Originally Posted by gcssat View Post
Can you put a circle or arrow to the affected area? I'm having a hard time identifying what you are describing. I can check it against my E350BT.

Greg
Take a look at the photos in this post and compare them to your car.
https://mbworld.org/forums/e-class-w...43#post5670199
thefisch is offline  
Old 07-28-2015, 01:03 AM
  #6  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC
Hey guys - look at the photo I uploaded and focus on the felt material that is jutting out to the right of the V6 logo on the engine hood. I left my car at the dealership today and they plan on replacing the rubber seal as well as the felt panel.

As far as my own attempts at soundproofing.. I purchased the quietest tires offered for 17 inch rims (based on aggregate review scores and now my personal opinion), the "Cinturato P7 All Season Plus" tires. I put second skin luxury liner, it's about 1/4 inch thick of closed-cell sound deadening matting, underneath my floor mats; I had to cut them just right to prevent them from being exposed while underneath the factory mats. Lastly, I installed Dynamat around the Urea tank in the rear of the car as a lot of road noise tends to enter the trunk via this area. I plan on removing the rear seats soon so I can get to the rear floor pan and I will line that area with what's left of the second skin luxury liner.

So far I've noticed a pretty significant reduction in road noise but wind noise remains an issue. I did initially have air leaking through the windshield at high speeds but the dealer was able to narrow the issue down to a bad seal in the top left of my windshield. I wish our vehicles came with laminated windows considering what we paid for them but at the end of the day I can always turn my sound system up.

Last edited by Carpenter Maass; 07-28-2015 at 01:05 AM.
Carpenter Maass is offline  
Old 07-28-2015, 03:07 AM
  #7  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC
Can someone with a diesel engine upload a picture of the area behind the engine cover where the foil backing meets the rubber seal (the heat shield near the top of my photo). I want to make sure that that portion of my seal is seated correctly.
Carpenter Maass is offline  
Old 07-28-2015, 10:52 AM
  #8  
Out Of Control!!
 
konigstiger's Avatar
 
Join Date: Jul 2003
Location: North Scottsdale, AZ
Posts: 10,129
Liked 1,063 Times in 909 Posts
'71 Pinto
Deformation as documented by bulletin 056043 referenced above requiring replacement to optimized seal part 2126280800.
Attached Thumbnails Soundproofing doesn't look right inside bluetec engine compartment-056043_1.jpg   Soundproofing doesn't look right inside bluetec engine compartment-capture.jpg  
konigstiger is offline  
Old 07-30-2015, 02:03 AM
  #9  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC
Originally Posted by konigstiger View Post
Deformation as documented by bulletin 056043 referenced above requiring replacement to optimized seal part 2126280800.
The repair is not covered under my extended warranty; the shop wanted $737 dollars to repair the sound-proofing board and rubber seal to the right of the engine (?!?!?!?). Using a large washer and a new bolt and screw I will fix myself for $10 tomorrow. I will take pictures for anyone else in the same boat.

Btw, the heat shield in the rear is seated correctly against the top seal.
Carpenter Maass is offline  
Old 07-30-2015, 02:58 AM
  #10  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC


Complete.


Ok - issue fixed in under 5 minutes. I do need to buy some heat-resistant glue for the section at the top of the sound-proofing panel that is separating.

The screw that is highlighted with a blue circle (my best attempt at a circle with paint) is the one you will want to install a washer on the other side of.

The screw head was all that kept the panel in place and as you can imagine with time, heat, and vibration it's no wonder the panel works its way out.



Screw in question




Washers purchased from Walmart for 2 dollars




The liner is now flush with the metal backing. The part of the upper soundboard that has frayed can be fixed with just a bit of glue; I haven't done this part yet.
Carpenter Maass is offline  
Old 07-30-2015, 06:48 PM
  #11  
MBWorld Fanatic!
 
thefisch's Avatar
 
Join Date: Mar 2014
Location: West Central Florida
Posts: 3,071
Liked 302 Times in 261 Posts
2011 E550 P2 4M Sedan
Looking good. Need to go look at mine and see if these steps will help.
thefisch is offline  
Old 08-01-2015, 02:55 PM
  #12  
Super Member
 
Join Date: Dec 2010
Location: N.C. USA
Posts: 793
Liked 1 Time in 1 Post
2015, ML250 BlueTEC
More "quiet"

Originally Posted by Carpenter Maass View Post
Hey guys - look at the photo I uploaded and focus on the felt material that is jutting out to the right of the V6 logo on the engine hood. I left my car at the dealership today and they plan on replacing the rubber seal as well as the felt panel.

As far as my own attempts at soundproofing.. I purchased the quietest tires offered for 17 inch rims (based on aggregate review scores and now my personal opinion), the "Cinturato P7 All Season Plus" tires. I put second skin luxury liner, it's about 1/4 inch thick of closed-cell sound deadening matting, underneath my floor mats; I had to cut them just right to prevent them from being exposed while underneath the factory mats. Lastly, I installed Dynamat around the Urea tank in the rear of the car as a lot of road noise tends to enter the trunk via this area. I plan on removing the rear seats soon so I can get to the rear floor pan and I will line that area with what's left of the second skin luxury liner.

So far I've noticed a pretty significant reduction in road noise but wind noise remains an issue. I did initially have air leaking through the windshield at high speeds but the dealer was able to narrow the issue down to a bad seal in the top left of my windshield. I wish our vehicles came with laminated windows considering what we paid for them but at the end of the day I can always turn my sound system up.
Don't forget to Dynamat, or equivalent, the inside of the doors .

Last edited by greasykid; 08-04-2015 at 01:19 PM.
greasykid is offline  
Old 08-03-2015, 09:32 PM
  #13  
Junior Member
 
Join Date: Oct 2007
Posts: 25
Liked 1 Time in 1 Post
C320 & E350
A month ago i took my car for service and showed something similar to my SA. They changed it under warranty.
eldivino is offline  
Old 08-07-2015, 03:40 AM
  #14  
Member
Thread Starter
 
Carpenter Maass's Avatar
 
Join Date: Mar 2014
Posts: 80
Likes: 0
Liked 0 Times in 0 Posts
2012 W212 BlueTEC
Originally Posted by greasykid View Post
Don't forget to Dynamat, or equivalent, the inside of the doors .
I seriously want to do this part next but I am too afraid of accidentally damaging a trim clip in the process. I did see the documentation provided by a fellow forum member where he pretty much encased everything in sound deadening material but I would probably feel more comfortable tackling this if I had a video to go by.
Carpenter Maass is offline  
 

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: Soundproofing doesn't look right inside bluetec engine compartment


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: