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c300 Engine Whine upon Acceleration
Thread Starter
Newbie
Joined: Sep 2011
Posts: 1
Likes: 0
c300
c300 Engine Whine upon Acceleration
Hi all,
I've been having a problem with my 2009 c300 4matic which Mercedes can't seem to find the cause of. Had the transfer case and transmission replaced under warranty. Had the windshield replaced as well.
Problem: High pitched engine whine upon acceleration at 2000 rpm. Happens everytime around 2000 rpm and disappears when I take my foot off the gas. It is barely discernible but is very annoying.
Thanks. Any suggestions would be appreciated.
I've been having a problem with my 2009 c300 4matic which Mercedes can't seem to find the cause of. Had the transfer case and transmission replaced under warranty. Had the windshield replaced as well.
Problem: High pitched engine whine upon acceleration at 2000 rpm. Happens everytime around 2000 rpm and disappears when I take my foot off the gas. It is barely discernible but is very annoying.
Thanks. Any suggestions would be appreciated.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If you rev the vehicle stationary & obviously out of gear can you repreduce the sound?
Best case scenario is a belt tensioner. Worst is a Torque converter or transmission oil pump or both.
BTW - the transfer case is integral with the transmission.
Best case scenario is a belt tensioner. Worst is a Torque converter or transmission oil pump or both.
BTW - the transfer case is integral with the transmission.
Senior Member
Joined: Oct 2011
Posts: 252
Likes: 0
From: NOVA
c300 4matic
Damn man, I have the EXACT same problem. Don't know what it is and MB says they can't find out whats causing it. It only happens sometimes for me though. It sounds almost like an F1 car when you let off the gas if we are thinking of the same sound. I don't think its the engine noise. I think it might have something to do with the tires or wheels but not exactly sure.
Member
Joined: Jul 2009
Posts: 120
Likes: 0
w204
Power steering pump...OR the power steering pump PULLEY.
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
Member
Joined: Nov 2011
Posts: 153
Likes: 0
From: Toronto, Canada
2008 C300 6speed, 2015 GLK 250 2017 E400 wagon
Power steering pump...OR the power steering pump PULLEY.
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
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Newbie
Joined: Oct 2010
Posts: 13
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11 GLK350 4Matic
solution?
Did you find any solution to your problem? Any update? TIA
Hi all,
I've been having a problem with my 2009 c300 4matic which Mercedes can't seem to find the cause of. Had the transfer case and transmission replaced under warranty. Had the windshield replaced as well.
Problem: High pitched engine whine upon acceleration at 2000 rpm. Happens everytime around 2000 rpm and disappears when I take my foot off the gas. It is barely discernible but is very annoying.
Thanks. Any suggestions would be appreciated.
I've been having a problem with my 2009 c300 4matic which Mercedes can't seem to find the cause of. Had the transfer case and transmission replaced under warranty. Had the windshield replaced as well.
Problem: High pitched engine whine upon acceleration at 2000 rpm. Happens everytime around 2000 rpm and disappears when I take my foot off the gas. It is barely discernible but is very annoying.
Thanks. Any suggestions would be appreciated.
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Member
Joined: Nov 2012
Posts: 237
Likes: 2
C300, ML350
Power steering pump...OR the power steering pump PULLEY.
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
JUST had mine done...1 month out of warranty...they dealership actually fixed it for free.
$120 part...was on my way out to preform the service at my house when my service guy asked if i wanted to pull the car around and they'd put it on...took'em 25 mins.
whine gone instantly...good luck!
Could you explain the whine of your vehicle you had? Was it upon acceleration?
Member
Joined: Nov 2011
Posts: 153
Likes: 0
From: Toronto, Canada
2008 C300 6speed, 2015 GLK 250 2017 E400 wagon
I replaced the whole pump assembly. pulley included. it made noise on accelerating and idling and turning the steeeing wheel. possibility the ps pulley fixes it. but I did the whole thing at once. good luck.
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Senior Member
Joined: Feb 2012
Posts: 369
Likes: 7
From: IA
2018 C63s Coupe 2016 C450 DAILY
Hello Glyn,
Sorry to bring this post back up but my updated post is getting very little answers . Here's a clip of my 08sport making this noise, dealer states it's "normal" also states my power steering being extremely loud is normal as well .
link to video
https://www.dropbox.com/s/k2tvyi0za9k44k5/VIDEO0001.mp4
Sorry to bring this post back up but my updated post is getting very little answers . Here's a clip of my 08sport making this noise, dealer states it's "normal" also states my power steering being extremely loud is normal as well .
link to video
https://www.dropbox.com/s/k2tvyi0za9k44k5/VIDEO0001.mp4
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,331
Likes: 9
From: Delaware
2004 Mazda6, 1993 RX7
Originally Posted by kevink2:
"the 1st part (of the video) was the most interesting. I think I can hear it as the revs increase over 2K. If possible repeat it with same slow increase in revs, but don't stop or delay until 3500-4000 rpm. A couple of accelerations will do."
I asked twice before, for the third and final time, how about doing something other than typing !
.
"the 1st part (of the video) was the most interesting. I think I can hear it as the revs increase over 2K. If possible repeat it with same slow increase in revs, but don't stop or delay until 3500-4000 rpm. A couple of accelerations will do."
I asked twice before, for the third and final time, how about doing something other than typing !
.
Senior Member
Joined: Feb 2012
Posts: 369
Likes: 7
From: IA
2018 C63s Coupe 2016 C450 DAILY
Originally Posted by kevink2:
"the 1st part (of the video) was the most interesting. I think I can hear it as the revs increase over 2K. If possible repeat it with same slow increase in revs, but don't stop or delay until 3500-4000 rpm. A couple of accelerations will do."
I asked twice before, for the third and final time, how about doing something other than typing !
.
"the 1st part (of the video) was the most interesting. I think I can hear it as the revs increase over 2K. If possible repeat it with same slow increase in revs, but don't stop or delay until 3500-4000 rpm. A couple of accelerations will do."
I asked twice before, for the third and final time, how about doing something other than typing !
.
Sorry for the delay. Here's the link to that video .
https://www.dropbox.com/s/cd0aojbkwhdjkfo/VIDEO0002.mp4
Senior Member
Joined: Feb 2012
Posts: 369
Likes: 7
From: IA
2018 C63s Coupe 2016 C450 DAILY
Here's a TSB i found on alldatadiy.com
Replacement of Refrigerant Compressor Belt Pulley Due to Noise Complaints If you receive customer reports in the above model vehicles of noises at the refrigerant compressor with air conditioning activated and deactivated, the cause could be a defective belt pulley or belt pulley bearing. The pulley and pulley bearing can be diagnosed and replaced with the compressor still installed in the vehicle by following the procedures below.
1. Locate the noise by duplicating the conditions under which the complaint occurred.
2. If there is also a cooling performance complaint, the noise could be caused by low refrigerant level, perform a Refrigerant Circuit Test as per SDS and follow instructions for corrective actions.
3. Before the belt pulley on the refrigerant compressor is replaced, verify that the following components in the belt drive are not the source of the noise and repair as required.
^ Alternator
^ Power steering pump
^ Guide pulleys / tensioner pulleys
^ Water pump
4. If there is a whining noise that is RPM-dependant which is present with the air conditioning on AND off and is determined to be caused by the tensioner pulleys, guide pulleys or refrigerant compressor, continue with step 5.
I would assume it's the alternator, power steering pump or water pump then.
Replacement of Refrigerant Compressor Belt Pulley Due to Noise Complaints If you receive customer reports in the above model vehicles of noises at the refrigerant compressor with air conditioning activated and deactivated, the cause could be a defective belt pulley or belt pulley bearing. The pulley and pulley bearing can be diagnosed and replaced with the compressor still installed in the vehicle by following the procedures below.
1. Locate the noise by duplicating the conditions under which the complaint occurred.
2. If there is also a cooling performance complaint, the noise could be caused by low refrigerant level, perform a Refrigerant Circuit Test as per SDS and follow instructions for corrective actions.
3. Before the belt pulley on the refrigerant compressor is replaced, verify that the following components in the belt drive are not the source of the noise and repair as required.
^ Alternator
^ Power steering pump
^ Guide pulleys / tensioner pulleys
^ Water pump
4. If there is a whining noise that is RPM-dependant which is present with the air conditioning on AND off and is determined to be caused by the tensioner pulleys, guide pulleys or refrigerant compressor, continue with step 5.
I would assume it's the alternator, power steering pump or water pump then.
Junior Member
Joined: Feb 2013
Posts: 39
Likes: 0
From: Livingston, NJ
2011 C300 W204 (Pending)
Here's a TSB i found on alldatadiy.com
Replacement of Refrigerant Compressor Belt Pulley Due to Noise Complaints If you receive customer reports in the above model vehicles of noises at the refrigerant compressor with air conditioning activated and deactivated, the cause could be a defective belt pulley or belt pulley bearing. The pulley and pulley bearing can be diagnosed and replaced with the compressor still installed in the vehicle by following the procedures below.
1. Locate the noise by duplicating the conditions under which the complaint occurred.
2. If there is also a cooling performance complaint, the noise could be caused by low refrigerant level, perform a Refrigerant Circuit Test as per SDS and follow instructions for corrective actions.
3. Before the belt pulley on the refrigerant compressor is replaced, verify that the following components in the belt drive are not the source of the noise and repair as required.
^ Alternator
^ Power steering pump
^ Guide pulleys / tensioner pulleys
^ Water pump
4. If there is a whining noise that is RPM-dependant which is present with the air conditioning on AND off and is determined to be caused by the tensioner pulleys, guide pulleys or refrigerant compressor, continue with step 5.
I would assume it's the alternator, power steering pump or water pump then.
Replacement of Refrigerant Compressor Belt Pulley Due to Noise Complaints If you receive customer reports in the above model vehicles of noises at the refrigerant compressor with air conditioning activated and deactivated, the cause could be a defective belt pulley or belt pulley bearing. The pulley and pulley bearing can be diagnosed and replaced with the compressor still installed in the vehicle by following the procedures below.
1. Locate the noise by duplicating the conditions under which the complaint occurred.
2. If there is also a cooling performance complaint, the noise could be caused by low refrigerant level, perform a Refrigerant Circuit Test as per SDS and follow instructions for corrective actions.
3. Before the belt pulley on the refrigerant compressor is replaced, verify that the following components in the belt drive are not the source of the noise and repair as required.
^ Alternator
^ Power steering pump
^ Guide pulleys / tensioner pulleys
^ Water pump
4. If there is a whining noise that is RPM-dependant which is present with the air conditioning on AND off and is determined to be caused by the tensioner pulleys, guide pulleys or refrigerant compressor, continue with step 5.
I would assume it's the alternator, power steering pump or water pump then.
Junior Member
Joined: Feb 2013
Posts: 39
Likes: 0
From: Livingston, NJ
2011 C300 W204 (Pending)
Heres how my 2011 C300 sounds like:
http://www.youtube.com/watch?v=7fovQ...ature=youtu.be
Windows are up due to windy day.
http://www.youtube.com/watch?v=7fovQ...ature=youtu.be
Windows are up due to windy day.
Junior Member
Joined: May 2013
Posts: 19
Likes: 1
2021 C300 4matic
Don't mean to bring up an old thread, but I noticed a whine on my car similar to what you described. I took the car into the dealership thinking it was prob power steering but my dealership called me today and said I needed a new transmission and transfer case...under warranty...thank god.
Member
Joined: Nov 2012
Posts: 237
Likes: 2
C300, ML350
Heres how my 2011 C300 sounds like:
http://www.youtube.com/watch?v=7fovQ...ature=youtu.be
Windows are up due to windy day.
http://www.youtube.com/watch?v=7fovQ...ature=youtu.be
Windows are up due to windy day.
Hi,
What ended up being the issue?
Member
Joined: Jul 2013
Posts: 192
Likes: 4
From: NYC | NJ | FL
X4M, G80 M3
I have a whine noise as well upon accelerating once i let go off the accelerator its gone.
I took it to my mechanic (not dealer) and they think its the idle pulley, searching here I thought it was either idle pulley or alternator.
Mechanic called me back saying its Air Compressor thinking here
I took it to my mechanic (not dealer) and they think its the idle pulley, searching here I thought it was either idle pulley or alternator.
Mechanic called me back saying its Air Compressor thinking here
Senior Member
Joined: Feb 2012
Posts: 369
Likes: 7
From: IA
2018 C63s Coupe 2016 C450 DAILY
If you are all experiencing this whine upon acceleration. It's most likely due to the transmission, they've changed all the pulleys in mine more than once and then eventually told me to "**** off " politely by stating it's normal now. Or they can't reproduce the noise because they don't drive this car daily to tell a difference anyways. Best bet if you're in warranty, take it to a reputable dealer who's willing to acknowledge the issue and not talk to you as if you just got into YOUR car and don't know from normal to abnormal. Or, go to a trustworthy Indy shop and spend a couple hundred to get the issue diagnosed truthfully.
Member
Joined: Jul 2013
Posts: 192
Likes: 4
From: NYC | NJ | FL
X4M, G80 M3
In my case I have the whine noise only upon accelerating and sometimes idle when i first turn it on, but if im already driving the car and i hold on the brake the noise goes away.
I thought it was the idle pulley or alternator as well, then i started reading this link and noticed I had issues with my windows defogging properly too.
https://mbworld.org/forums/c-class-w...ompressor.html
I thought it was the idle pulley or alternator as well, then i started reading this link and noticed I had issues with my windows defogging properly too.
https://mbworld.org/forums/c-class-w...ompressor.html
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
I have had a whine for 3 1/2 years which is only heard when the air-conditioner is on & only under light load. On a hot day ie 34'C it is not present.
The whine sounds very rpm dependent ie raises & lowers the pitch.
It takes about 40 seconds to disappear when the A/C is turned off but disappears immediately when the set point is lowered.
Sounds like a gas/ liquid throttling noise to me, not mechanical.
Any advice welcome.
The whine sounds very rpm dependent ie raises & lowers the pitch.
It takes about 40 seconds to disappear when the A/C is turned off but disappears immediately when the set point is lowered.
Sounds like a gas/ liquid throttling noise to me, not mechanical.
Any advice welcome.
