thumping noise in the back
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thumping noise in the back
hey guyz, it was fixed! the noise in the back turned out to be that the heat exhuast shield was a little loose. i do not know what the caused the problem in the first place, but could have been my driven on these terrible god awful so-called roads michigan and ohio have me driving on.
Senior Member
Joined: Mar 2003
Posts: 350
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From: Stamford, CT
2003 C230
Can you be more specific?
How is the exhaust heat shield make thumbing noises? I have them too and I have had them since day 1. I noticed that it happens when stopped (I guess the shield is cooling off, contracting ) after the car has been ran hard (shield probably got too hot ).
Thanks
CZ
p.s. Did you figure it out yourself? Was it replaced or tightened up?
Thanks
CZ
p.s. Did you figure it out yourself? Was it replaced or tightened up?
Guest
Posts: n/a
i did not figure it out myself. i thought the problem was with the rear left wheel. they tech came and tested the wheel out and did not figure it out. so they gave me a loaner while he wanted to run some extensive tests. the sheet they gave me said "heat shield exhaust system repair" and does not indicate whether it was replaced or tightened.
i do not thinking it had to do with running the car too hard since it always did it since starting the engine and going over the bump in our driveway. something must of hit it and loosin it up a bit to act up against the bottom of the car. the thumping only came while driving over small bumps and larger, not at a stop like yours.
i'll ask them when i take our other benz in for service A exactly what they did.
i do not thinking it had to do with running the car too hard since it always did it since starting the engine and going over the bump in our driveway. something must of hit it and loosin it up a bit to act up against the bottom of the car. the thumping only came while driving over small bumps and larger, not at a stop like yours.
i'll ask them when i take our other benz in for service A exactly what they did.
Senior Member
Joined: Mar 2005
Posts: 303
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From: Avon, CT
07 G35 Sport 6MT, 2005 C230K SS (sold), 1998 Jeep GC 4x4 (da-heep!)
Wow, honestly I never thought it was a problem. I just assumed it was a pump or something. Guess I'll have the dealer look at it.
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Joined: Mar 2004
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From: michigan/ohio/indiana
2013 c300 4matic, 2002 c240
Originally Posted by coconutpolito
Has anyone else tried this? My thumping noise happens only when my car is stopped. It's always thump thump thump silence thump thump thump.
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Senior Member
Joined: Jan 2006
Posts: 491
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From: Redding, California
AMG GTS
Originally Posted by pookie
well, try to narrow the location of the noise. can you just hear the noise while in the car or can you isolate the sound from the outside? we need more info than 'thump thump' sounds. it can be a number of things.
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Joined: Sep 2005
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I'm glad that someone started this thread. I just got my car back today and my SA cannot duplicate my complaint with the thumping coming from the rear when the car is at a full stop. It sounds like someone is knocking from the inside of your trunk. Then I realized that this could be some back pressure issues with the exhaust and sure enough my tech said that there are some 06's coming in with the same complaints. He went on to explain that MB released a new engine software update to correct this problem that has some relation to the confliction in climate. Will be seeing them soon.
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Joined: Sep 2005
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I took my car in again for this issue and they swear up and down that they fixed the problem but it's still there. I'm down in Miami and at my dealership they only had this issue with 2 other cars. I don't think they're too motivated to get to the root of the problem.
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Joined: Sep 2005
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I took my car in again for this issue and they swear up and down that they fixed the problem but it's still there. I'm down in Miami and at my dealership they only had this issue with 2 other cars. I don't think they're too motivated to get to the root of this problem.
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Joined: Dec 2005
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From: asdfasdf
One with 4 wheels
My car also has the "thumping" noise from the exhaust; there is also a "shrilly metallic-ky" sound that seems to come from the exhaust when I'm either parked or when the car is at a red light idling. The thumping noise can only be heard when I'm inside the car; the metalli-ky shrill sound can be heard when I'm outside the car, standing by the exhaust.
Does this happen to a lot of people, or are we just an unlucky bunch?
Does this happen to a lot of people, or are we just an unlucky bunch?
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Joined: Dec 2005
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From: asdfasdf
One with 4 wheels
Just a little update guys; I took my car to Park Place MB in Dallas, and the service I received was as expected.
I called in for two things:
1.) Passenger side outside mirror clear corner turn signals build up moisture and fog up during rain. Drivers side do not fog up.
2.) Exhaust makes metallic-ky "leaky air" sound when idling.
Park Place MB's diagnosis for both defects/issues:
Both issues fall within factory specs.
Are you F-ING KIDDING ME???????? It's normal for the passenger turn signal to FOG up when it rains, and it's NORMAL for my exhaust to sound like it's LEAKING?
It's BS like this that will deter me from ever buying MB again.
I called in for two things:
1.) Passenger side outside mirror clear corner turn signals build up moisture and fog up during rain. Drivers side do not fog up.
2.) Exhaust makes metallic-ky "leaky air" sound when idling.
Park Place MB's diagnosis for both defects/issues:
Both issues fall within factory specs.
Are you F-ING KIDDING ME???????? It's normal for the passenger turn signal to FOG up when it rains, and it's NORMAL for my exhaust to sound like it's LEAKING?
It's BS like this that will deter me from ever buying MB again.
Senior Member
Joined: Oct 2005
Posts: 297
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From: NorCal
2006 C230
I was informed all mercedes make that thumping sound and it's due to emissions. I don't think I'll be buying another benz ever. It didn't make the sound when I bought the car, it shouldn't be making it now. I own 2 mercedes right now and I will be selling them both soon due to the poor service on this issue.
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Joined: May 2006
Posts: 53
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From: Germany - 4mo left :(
2007 C280 4matic
My 07 is doing the same thing it seems to be 2 sets of 3 thumps when i stop. Currently being in Germany I hope i get better costumer service then you guys in the states. Hearing about the great service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.
service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.
Senior Member
Joined: Oct 2005
Posts: 297
Likes: 0
From: NorCal
2006 C230
My 07 is doing the same thing it seems to be 2 sets of 3 thumps when i stop. Currently being in Germany I hope i get better costumer service then you guys in the states. Hearing about the great service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.
service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.
Almost a Member!
Joined: May 2006
Posts: 53
Likes: 0
From: Germany - 4mo left :(
2007 C280 4matic
MBWorld Fanatic!
Joined: Dec 2005
Posts: 2,158
Likes: 0
From: asdfasdf
One with 4 wheels
My 07 is doing the same thing it seems to be 2 sets of 3 thumps when i stop. Currently being in Germany I hope i get better costumer service then you guys in the states. Hearing about the great service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.
service you guys talk about i fear bringing my car back with me. I will let you guys know what they say about the thumping.Jackass. Seriously, what happened to what was once "World-Class Service"?
I used to get treated better at my Honda dealership! I didn't expect such rude and vile treatment from MB.
I wonder if BMW service is this bad too........
Senior Member
Joined: Mar 2003
Posts: 350
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From: Stamford, CT
2003 C230
My 03 C230K has been thumping since day 1 when purchased new
They tested the heat shield, no problem there. They claim it's the fact that we have 2 fuel pumps, and 2 tanks. The pumps move fuel from 1 tank to the other to balance the car weight. That's probably BS but that's what I was told. Supposedly the pumps make the thumping noise. Weird thing is the thumping only happens when stopped NEVER while moving.
CZ
CZ
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Joined: Aug 2005
Posts: 45
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From: Allen (Dallas) Tx.
2005 C230K SS
I've been noticing this sort of thumping noise lately as well.
I have a 2 year old C 230K (2005) and the only time I hear the noise is when I'm stopped at a light.
Strangely it doesn't always happen either.
Will mention it to my service adviser the next time I have the car in, to see what they say, as at this point I'm not overly concerned by it.
I have a 2 year old C 230K (2005) and the only time I hear the noise is when I'm stopped at a light.
Strangely it doesn't always happen either.
Will mention it to my service adviser the next time I have the car in, to see what they say, as at this point I'm not overly concerned by it.
