Buzzing noise from Sensotronic brakes
03-13-2003, 09:26 PM
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1997 Toyota Tacoma 4x4
Buzzing noise from Sensotronic brakes
There's a new bulletin that just came out for those of you that hear a buzzing noise from your brake system. A pulsation damper is to be retrofitted into the suction line near the main SBC hydraulic unit.
03-13-2003, 11:28 PM
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Re: Buzzing noise from Sensotronic brakes
Originally posted by mbtech208
There's a new bulletin that just came out for those of you that hear a buzzing noise from your brake system. A pulsation damper is to be retrofitted into the suction line near the main SBC hydraulic unit.
There's a new bulletin that just came out for those of you that hear a buzzing noise from your brake system. A pulsation damper is to be retrofitted into the suction line near the main SBC hydraulic unit.
11-17-2003, 12:01 AM
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'02 E55
Is this happening on '04s???
I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal.
It's VERY annoying driving at night with the radio off since it's dead quiet in the car. I can't stand it and Laguna Nigel techs said the sensotronic brakes make a lot of noise and people complain all the time and to join the crowd!!
I didn't even test drive the car since we just traded in the '01 E320 Wagon assuming the new one was a great car. The brakes are completely annoying.
Sould I try another dealer service center?
It's VERY annoying driving at night with the radio off since it's dead quiet in the car. I can't stand it and Laguna Nigel techs said the sensotronic brakes make a lot of noise and people complain all the time and to join the crowd!!
I didn't even test drive the car since we just traded in the '01 E320 Wagon assuming the new one was a great car. The brakes are completely annoying.
Sould I try another dealer service center?
11-17-2004, 12:28 PM
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2011 E550, 2013 GLK
I have an E320 with a build date of 3/2004 and I have no noise at all other then the faint sound of the pump running occasionally.
What I do have is a thump from the brakes when I apply and release them when driving very slowly.
I don't suppose the pulsation damper would cure the problem.
What I do have is a thump from the brakes when I apply and release them when driving very slowly.
I don't suppose the pulsation damper would cure the problem.
11-17-2004, 02:40 PM
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04 E320 4 Matic, 95 Audi S6, 99 Carrera 4 Cabrio, 12 Fiat 500 Sport, 00 BMW R1200C 10, BMW R1200R
This is for sound #1
" I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal."
The other posts are talking about sound #2
There is some important cross talking here!
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
#2 The Pulsation Damper is for another noise. When the SBC is used a lot and every time that the booster has to accumulate pressure, the SBC pump turns on. It sounds like a pump working. It will make this noise most every time you start the car after a while of sitting. This sound is annoying.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
Also, the pulsation damper fix, that also requires a hydraulic line change it a bit much. Some dealers have found that just installing the pulsation damper is enough. There have been cases where all the air in the brake lines was not purged and people lost brakes after driving away from the dealer. I just had the Pulsation damper changed and opted to keep the brake lines. I compared the sound with a loaner car that they did the whole repair to and sound #1 was still there. Sound #2 was the same intensity. There was no difference between my car, which did not have the hydraulic line change and the loaner E that did when it came to noise #2.
So, I strongly recommend that pulsation damper repair. It makes the car much quieter. Changing the hydraulic line is up to you.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
" I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal."
The other posts are talking about sound #2
There is some important cross talking here!
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
#2 The Pulsation Damper is for another noise. When the SBC is used a lot and every time that the booster has to accumulate pressure, the SBC pump turns on. It sounds like a pump working. It will make this noise most every time you start the car after a while of sitting. This sound is annoying.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
Also, the pulsation damper fix, that also requires a hydraulic line change it a bit much. Some dealers have found that just installing the pulsation damper is enough. There have been cases where all the air in the brake lines was not purged and people lost brakes after driving away from the dealer. I just had the Pulsation damper changed and opted to keep the brake lines. I compared the sound with a loaner car that they did the whole repair to and sound #1 was still there. Sound #2 was the same intensity. There was no difference between my car, which did not have the hydraulic line change and the loaner E that did when it came to noise #2.
So, I strongly recommend that pulsation damper repair. It makes the car much quieter. Changing the hydraulic line is up to you.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
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11-17-2004, 09:18 PM
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Build date 2-04 E500
Originally Posted by mbtech208
There's a new bulletin that just came out for those of you that hear a buzzing noise from your brake system. A pulsation damper is to be retrofitted into the suction line near the main SBC hydraulic unit.
Thanks again.
11-18-2004, 07:16 AM
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2000 W210 E55->2003 R230 SL500->2004 W211 E55->2007 997TT+2007 E63->2010 GLK350->2012 E550 4matic
Originally Posted by SAguirre
This is for sound #1
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
11-18-2004, 11:18 PM
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4 wheels
Originally Posted by ipaq123
I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal.
It's VERY annoying driving at night with the radio off since it's dead quiet in the car. I can't stand it and Laguna Nigel techs said the sensotronic brakes make a lot of noise and people complain all the time and to join the crowd!!
I didn't even test drive the car since we just traded in the '01 E320 Wagon assuming the new one was a great car. The brakes are completely annoying.
Sould I try another dealer service center?
It's VERY annoying driving at night with the radio off since it's dead quiet in the car. I can't stand it and Laguna Nigel techs said the sensotronic brakes make a lot of noise and people complain all the time and to join the crowd!!
I didn't even test drive the car since we just traded in the '01 E320 Wagon assuming the new one was a great car. The brakes are completely annoying.
Sould I try another dealer service center?
11-18-2004, 11:44 PM
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'71 Pinto
There are two bulletins concerning SBC noise:
P-B-42.46-27c DEC03
Buzzing Noise during Pressure Buildup from SBC system
P-42.46-32A JAN04
Whistling Noise When Depressing Brake Pedal
P-B-42.46-27c DEC03
Buzzing Noise during Pressure Buildup from SBC system
P-42.46-32A JAN04
Whistling Noise When Depressing Brake Pedal
01-24-2005, 12:03 AM
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2003 E320
Originally Posted by SAguirre
This is for sound #1
" I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal."
The other posts are talking about sound #2
There is some important cross talking here!
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
#2 The Pulsation Damper is for another noise. When the SBC is used a lot and every time that the booster has to accumulate pressure, the SBC pump turns on. It sounds like a pump working. It will make this noise most every time you start the car after a while of sitting. This sound is annoying.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
Also, the pulsation damper fix, that also requires a hydraulic line change it a bit much. Some dealers have found that just installing the pulsation damper is enough. There have been cases where all the air in the brake lines was not purged and people lost brakes after driving away from the dealer. I just had the Pulsation damper changed and opted to keep the brake lines. I compared the sound with a loaner car that they did the whole repair to and sound #1 was still there. Sound #2 was the same intensity. There was no difference between my car, which did not have the hydraulic line change and the loaner E that did when it came to noise #2.
So, I strongly recommend that pulsation damper repair. It makes the car much quieter. Changing the hydraulic line is up to you.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
" I just picked up my wife's '04 E320 Wagon about a week ago and have logged 500 miles on the car. It makes a whine/buzzing noise (very high pitched) everytime I apply the brake pedal."
The other posts are talking about sound #2
There is some important cross talking here!
#1 The noise we are talking about here is the high pith electrical vibration noise that occurs when the brake pedal is pushed. For that, I don’t know of any fix yet.
#2 The Pulsation Damper is for another noise. When the SBC is used a lot and every time that the booster has to accumulate pressure, the SBC pump turns on. It sounds like a pump working. It will make this noise most every time you start the car after a while of sitting. This sound is annoying.
One sound has nothing to do with the other. Sound #1 is very faint and happens most every time your foot is on the brakes and the car is quiet. Sound #2 is a much louder and obvious sound and only happens on occasion.
I went to my dealer complaining about sound #1 and they interpreted is as being sound #2. They installed the pulsation damper and sound #2 is almost gone all together. Sound #1 is still there.
Also, the pulsation damper fix, that also requires a hydraulic line change it a bit much. Some dealers have found that just installing the pulsation damper is enough. There have been cases where all the air in the brake lines was not purged and people lost brakes after driving away from the dealer. I just had the Pulsation damper changed and opted to keep the brake lines. I compared the sound with a loaner car that they did the whole repair to and sound #1 was still there. Sound #2 was the same intensity. There was no difference between my car, which did not have the hydraulic line change and the loaner E that did when it came to noise #2.
So, I strongly recommend that pulsation damper repair. It makes the car much quieter. Changing the hydraulic line is up to you.
The repair for sound #1 is a mystery to me. I hope this clarifies the SBC brake noise we keep on talking about. They are two very distinct noises. Also, remember that it is a “damper” some people say it’s a “dampener.” A “dampener” would be something to make things wet. Much like a “yaw damper” on an airplane, a damper decreases oscillations of some sort or another.
I hope this fixes the crosstalking,
Steve Aguirre
Those that have had this done....can you tell if it has reduced the frequency that the pump comes on in the first place? My shop forman told me that the pump will still come on as frequently as it is now...which is about every other or 3rd brake application.
01-24-2005, 04:33 AM
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I'm sure that 'Wobbles' has complained quite strongly about noise #1
Does anyone know how he got on? Was it resolved?
Wobbles are you out there?
Good morning everyone,
John
A sunny but cool morning in Torquay
Does anyone know how he got on? Was it resolved?
Wobbles are you out there?
Good morning everyone,
John
A sunny but cool morning in Torquay
01-24-2005, 05:21 AM
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E200 Kompressor (sold 2008), BMW 7 series (2009), now waiting for the E63
Hi everyone,
Yes, I screamed my head off with regards to the high pitched noise ... and, after 2 attempts, the dealer managed to deaden the noise (greatly reduced, but not gone completely) ... I have NO idea how/what they did, but my head doesn't spin that much whenever I depress the brake now
Yes, I screamed my head off with regards to the high pitched noise ... and, after 2 attempts, the dealer managed to deaden the noise (greatly reduced, but not gone completely) ... I have NO idea how/what they did, but my head doesn't spin that much whenever I depress the brake now
01-24-2005, 05:43 AM
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Originally Posted by wobbles
Hi everyone,
Yes, I screamed my head off with regards to the high pitched noise ... and, after 2 attempts, the dealer managed to deaden the noise (greatly reduced, but not gone completely) ... I have NO idea how/what they did, but my head doesn't spin that much whenever I depress the brake now
Yes, I screamed my head off with regards to the high pitched noise ... and, after 2 attempts, the dealer managed to deaden the noise (greatly reduced, but not gone completely) ... I have NO idea how/what they did, but my head doesn't spin that much whenever I depress the brake now
Nice to hear from you again, and I am so very disappointed to hear that your car is still not quite right.
I have read somewhere that E-class for the Far Eastern market are being produced out there. Is this correct? or is it more 'journalistic licence'?
Take care, and do not settle for less than what YOU want!
John
01-24-2005, 08:33 PM
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E200 Kompressor (sold 2008), BMW 7 series (2009), now waiting for the E63
Hi glojo
I think there will be E-classes produced in China, in the future, but not as yet. My E-class was built in Germany ... but I really don't know if that's a good thing or not, with the minor irritations that have surfaced thus far (OK, so I'm being fussy).
I think there will be E-classes produced in China, in the future, but not as yet. My E-class was built in Germany ... but I really don't know if that's a good thing or not, with the minor irritations that have surfaced thus far (OK, so I'm being fussy).
01-25-2005, 04:20 AM
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Originally Posted by wobbles
Hi glojo
I think there will be E-classes produced in China, in the future, but not as yet. My E-class was built in Germany ... but I really don't know if that's a good thing or not, with the minor irritations that have surfaced thus far (OK, so I'm being fussy).
I think there will be E-classes produced in China, in the future, but not as yet. My E-class was built in Germany ... but I really don't know if that's a good thing or not, with the minor irritations that have surfaced thus far (OK, so I'm being fussy).
Thanks for clarifying that. You are definitely not being fussy; I would suggest just the opposite. You have been both extremely tolerant and unlucky with the problems you have had to deal with. Quality control seems to be less of a priority in this modern era, vehicles are leaving Germany with horrible minor problems that should have been detected. If not detected at the factory then the PDI needs to be more vigorous.
If defects can be instantly noticed by the new owner, then surely they should never have got passed a professional inspector who is paid to find just these minor faults. Loose seats, rattles and other strange noises, electronic equipment not working, minor scratches etc. etc.
Bye for now,
John
A very sunny cool morning in Torquay
01-29-2005, 12:00 PM
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2003 E320
Just had mine done. NO pump noise heard at this time.
According to the invoice P.B. 42.46/27D was compleated.
(Install SBC Pulsation Dampner Suction Hose as per DTB P.B 42.46/27D)
According to the invoice P.B. 42.46/27D was compleated.
(Install SBC Pulsation Dampner Suction Hose as per DTB P.B 42.46/27D)
