Odd noise
Thread Starter
Almost a Member!
Joined: Aug 2005
Posts: 58
Likes: 0
Odd noise
Just picked up my '05 E320 4matic on Sat. and have heard a strange noise. When driving or backing up, it sounds like one of those mini compressors you use to fill your tires. It last for about 5 seconds each time (spuratic) and I can feel the vibration through the brake pedal. Very annoying! Any ideas? Will talk to the dealer tomorrow, but thought I'd post it here first. Thanks!
MBWorld Fanatic!
Joined: Apr 2004
Posts: 1,794
Likes: 3
From: Valley of the Sun, Arizona
2011 E550, 2013 GLK
Originally Posted by pasto27774
Just picked up my '05 E320 4matic on Sat. and have heard a strange noise. When driving or backing up, it sounds like one of those mini compressors you use to fill your tires. It last for about 5 seconds each time (spuratic) and I can feel the vibration through the brake pedal. Very annoying! Any ideas? Will talk to the dealer tomorrow, but thought I'd post it here first. Thanks!
Bulletin P-B-42.46/27A – Install pulsation damper for SBC Noisy brake pump
Junior Member
Joined: Mar 2003
Posts: 37
Likes: 0
From: UK
w211
I had this....
Complained and 2 mods were done - SBC software update - did not fix it.
But then a physical replacement of a valve or pipes or something (on the merc list of mods) and finished - gone forever - hurrah!
Took about 3-4 hours at the dealer.
Don't stand for the noise / bad vibrations!
Complained and 2 mods were done - SBC software update - did not fix it.
But then a physical replacement of a valve or pipes or something (on the merc list of mods) and finished - gone forever - hurrah!
Took about 3-4 hours at the dealer.
Don't stand for the noise / bad vibrations!
MBWorld Fanatic!
Joined: Apr 2004
Posts: 1,794
Likes: 3
From: Valley of the Sun, Arizona
2011 E550, 2013 GLK
Originally Posted by justin w
I had this....
Complained and 2 mods were done - SBC software update - did not fix it.
But then a physical replacement of a valve or pipes or something (on the merc list of mods) and finished - gone forever - hurrah!
Took about 3-4 hours at the dealer.
Don't stand for the noise / bad vibrations!
Complained and 2 mods were done - SBC software update - did not fix it.
But then a physical replacement of a valve or pipes or something (on the merc list of mods) and finished - gone forever - hurrah!
Took about 3-4 hours at the dealer.
Don't stand for the noise / bad vibrations!
The pulse dampener is what did the job. Look at your SBC pump and you will see that the two lines exiting the top have been modified.
In the process, you get a brake fluid change which reduced the herky-jerky operation I was experiencing in stop and go traffic. I still have it but it's not nearly as bad as when I got the car.
