Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-12-2010, 10:51 PM
Boston Benz's Avatar
Registered User
 
Join Date: Feb 2004
Location: Boston, MA
Posts: 289
Very brief buzz when brake pedal is depressed

1995 E320 Here's one I've never experienced before...

I just noticed that when I depress the brake pedal (I'm talking within the first centimeter of the pedal being depressed) I hear a very brief buzz that lasts a half-second, then disappears. I reapply the brake pedal, it does it again. I think the buzz is coming from behind the instrument cluster (?) The sound is so fleeting, it's hard to tell. What is this?

Reply With Quote
  #2  
Old 12-12-2010, 11:36 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
I found that on my car if I open the door with the car running and press the brake the warning buzzer will sound very very briefly. Does the buzz sound like the warning buzzer?

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
Reply With Quote
  #3  
Old 12-13-2010, 07:06 AM
JimFreeh's Avatar
Benz addict
 
Join Date: Mar 2007
Location: Hampton Roads, Virginia
Posts: 3,353
Anti-lock cutting in?

Jim
__________________
14 E250 BlueTEC black
94 E320 Cabriolet Emerald green
85 300TD 4 spd manual dark blue
Reply With Quote
  #4  
Old 12-13-2010, 08:21 AM
Boston Benz's Avatar
Registered User
 
Join Date: Feb 2004
Location: Boston, MA
Posts: 289
In fact I did have the driver's door open when this was happening. It could be the same tone/buzz as the when leaving the key in the ignition...

Just prior to this, my ABS/ASR light came on and the ABS was not working. For codes, I got the usual #1 no fault found. I erased the code. While doing all of this, that was when I noticed this brief buzz. It's been raining up here for the past two-days.
Reply With Quote
  #5  
Old 12-13-2010, 08:24 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Normal for that to happen with key on & door open.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #6  
Old 12-13-2010, 08:26 AM
Boston Benz's Avatar
Registered User
 
Join Date: Feb 2004
Location: Boston, MA
Posts: 289
Thanks, I don't think I ever noticed that...
Reply With Quote
  #7  
Old 12-13-2010, 10:32 AM
Registered User
 
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,946
Just normal behavior with SBC braking. That electric pump keeps things "ready" for sure.
__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '06 SLK350
Reply With Quote
  #8  
Old 12-13-2010, 11:10 AM
Craig
Guest
 
Posts: n/a
Quote:
Originally Posted by lkchris View Post
Just normal behavior with SBC braking. That electric pump keeps things "ready" for sure.
In a 1995 E320?

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:41 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page