Brake vibration (on occasion) - MBClub UK

Murphyslaw · 12-04-2011, 08:38 AM

All, why is it the brake pedal (noise can be heard outside the car also) on occasion makes a strange 'wuring' noise? You can feel vibration through the pedal also.

I checked the SBC pump and it has a build date 2 years after the car was made so I presume the pump has been changed already, but could it be another pump failure in the making?

GP801 · 12-04-2011, 08:45 AM

Could be as simple as worn or warped discs

Murphyslaw · 12-04-2011, 11:54 AM

Thanks but it does it when stationary (as well as on the move)?

Dieselman · 12-04-2011, 11:57 AM

If it's not the pump rubber mountings, then the pump is on the way out again.

Loads of pumps were changed in the first few years without customers being made aware, they are probably coming round to needing doing again.
once Mercedes no longer picks up the cost of these replacements this will write off many W211.

camerafodder · 12-04-2011, 01:10 PM

The SBC pump on my 211 has always done this. I wouldn't be too concerned I've done 70,000 miles with it making the same whirring noise that it always has.

Murphyslaw · 12-04-2011, 05:10 PM

Quote:

Originally Posted by Dieselman

once Mercedes no longer picks up the cost of these replacements this will write off many W211.

Really? Surely somewhere a W211 is breaking (eBay??) where these can be picked up secondhand for a cheap price? There is one on eBay now in fact for £250.

dvb247 · 12-04-2011, 09:09 PM

My car makes a buzzing sound when I unlock and open the car, and I also get buzzing noises through the brake pedal, apperently all standard stuff, had my car nearly 2 years with no change in noise and no faults!

Murphyslaw · 13-04-2011, 07:01 AM

Thanks, that helps to give me confidence in the car! This is my first Mercedes (been BMW for the last 10yrs) so learning the ropes so to speak!

Dieselman · 13-04-2011, 10:38 AM

Quote:

Originally Posted by Murphyslaw

Really? Surely somewhere a W211 is breaking (eBay??) where these can be picked up secondhand for a cheap price? There is one on eBay now in fact for £250.

The SBC pump is an increasingly common failure, so the requirement will outstrip supply of 2nd hand parts.
A new pump is £1200 + fitting so will make replacement uneconomical on lower value cars, when they get down to a couple of thousand pounds.
A lot of people will baulk at £200 for brake fluid replacement, but there is no DIY method with SBC.

12-04-2011, 08:38 AM	#1
Murphyslaw Member Join Date: Feb 2011 Car: 2002 Mercedes E270 CDI, 2010 Toyota RAV4 XTR Posts: 47	Brake vibration (on occasion) All, why is it the brake pedal (noise can be heard outside the car also) on occasion makes a strange 'wuring' noise? You can feel vibration through the pedal also. I checked the SBC pump and it has a build date 2 years after the car was made so I presume the pump has been changed already, but could it be another pump failure in the making?

12-04-2011, 08:45 AM	#2
GP801 Hardcore MB Enthusiast Join Date: Jun 2010 Location: Sussex and Tuscany Car: 2003 W209 CLK, 2005 R171 SLK in UK, 1995 S124 E280 in Italy Posts: 1,901	Could be as simple as worn or warped discs

12-04-2011, 11:54 AM	#3
Murphyslaw Member Threadstarter Join Date: Feb 2011 Car: 2002 Mercedes E270 CDI, 2010 Toyota RAV4 XTR Posts: 47	Thanks but it does it when stationary (as well as on the move)?

12-04-2011, 11:57 AM	#4
Dieselman Hardcore MB Enthusiast Join Date: Jul 2003 Car: Peugeot 403 Convertible Posts: 28,803	If it's not the pump rubber mountings, then the pump is on the way out again. Loads of pumps were changed in the first few years without customers being made aware, they are probably coming round to needing doing again. once Mercedes no longer picks up the cost of these replacements this will write off many W211.

12-04-2011, 01:10 PM	#5
camerafodder Hardcore MB Enthusiast Join Date: Jul 2007 Location: South Lakes Car: Tired old Pajero Posts: 1,468	The SBC pump on my 211 has always done this. I wouldn't be too concerned I've done 70,000 miles with it making the same whirring noise that it always has.

12-04-2011, 09:09 PM	#7
dvb247 Hardcore MB Enthusiast Join Date: Aug 2009 Location: Cheshire Car: AMG e55 Posts: 364	My car makes a buzzing sound when I unlock and open the car, and I also get buzzing noises through the brake pedal, apperently all standard stuff, had my car nearly 2 years with no change in noise and no faults!

13-04-2011, 07:01 AM	#8
Murphyslaw Member Threadstarter Join Date: Feb 2011 Car: 2002 Mercedes E270 CDI, 2010 Toyota RAV4 XTR Posts: 47	Thanks, that helps to give me confidence in the car! This is my first Mercedes (been BMW for the last 10yrs) so learning the ropes so to speak!

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