Brakes squeal after replacing - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

 
LinkBack Thread Tools
#1 Old 10-22-2012
Registered Users
 
Ninja650R's Avatar
 
Join Date: Jun 2009
Location: Boiling Springs, SC
Vehicle: 2006 SLK350 Diamond Silver
Other Toys: 2007 Candy Red VFR800A
Posts: 29
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 1 Time in 1 Post
(Thread Starter)
Brakes squeal after replacing

I don't post often, as my 2006 SLK350 seems to be a pretty solid car. But I recently replaced the brake pads on all 4 wheels. I replaced the front ones, and drove ~ 2 weeks. Then I replaced the rear ones. Then the brakes started squealing at very low speeds. Like metal-to-metal. I did not turn the rotors or replace them - maybe that's the problem. Dunno. Anyway, the squeal is coming from the FRONT per my wife's ears. I cannot tell. I've taken all 4 wheels off and checked everything, but all looks perfect. There are NO wear-bar indicators, so it's not something that simple. Of course I don't hear them at higher speeds, but they might be squealing at higher and I just can't hear it. But I never hear the squeal until I am almost stopped at 2-5 MPH.

I've check fluid, brakes, all bolts, etc, so I don't know what else to check. I've done searches on here, and even rode in reverse 10-15 MPH and braked hard, and that seemed to help a little, but not completely.

I can't stand having such an expensive car that sounds worse than anything else I have ever owned.

Anyone have any other ideas? New rotors? Short of having someone steal this thing?
Ninja650R is offline  
Sponsored Links
Advertisement
 
#2 Old 10-22-2012
Premium Member
 
Join Date: Feb 2011
Location: Indy
Posts: 2,421
Country:
Chats: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Thanks: 118
Thanked 290 Times in 244 Posts
Did you put enough "lube" on the back of the pads where they touch the caliper pistons?

"Think as I think," said a man,"Or you are abominably wicked; You are a toad."
And after I had thought about it, I said,
"I will, then, be a toad."(Thank you, Steven Crane)

Think outside the box!
Galo is offline  
#3 Old 10-22-2012
Registered Users
 
GeeJay's Avatar
 
Join Date: Jan 2009
Location: North-West Blighty.....
Vehicle: '16 C250d AMG Estate Premium+ Designo Hyacinth Metalic
Other Toys: Guitars... :-) Formerly '08 SLK200 6sp Palladium
Posts: 5,134
Country:
Chats: 91
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Thanks: 652
Thanked 793 Times in 574 Posts
High performance brakes often do squeel, especially if they aren't being worked hard. The pads get glazed.

In the good old days there used to be anti-squeel shims that needed a smear of copperslip, which I've typically applied to the back of most pads when I've fitted them. That said, the last time I changed pads on a car was a couple of years ago on a VW Sharan. The pads had an adhesive backing to stop them from squeeling. Had to peel off a protective layer before putting the pads in the caliper.

I don't know the details of the 350 brakes (or my 200 brakes for that matter) as I haven't worked on them.

As for not changing the rotors; on our 200, it's the rotors that are wearing out first! Still plenty of meat on the pads, but the rotor are getting quite heavily lipped. They will get swapped out in the spring, if not before.
GeeJay is offline  
 
#4 Old 10-22-2012
Moderator
 
curro101's Avatar
 
Join Date: May 2010
Location: Madrid-Spŕin
Vehicle: Slk 200K 2004 r171
Other Toys: Toyota C-HR Hybrid
Posts: 10,744
Country:
Chats: 0
Mentioned: 109 Post(s)
Tagged: 0 Thread(s)
Quoted: 528 Post(s)
Thanks: 1,500
Thanked 1,297 Times in 1,138 Posts
Garage
Never tried it yet , but I was told of a trick to get rid of brake squeaks , which is to place a piece of cardboard sheet between the pad and the piston ??
curro101 is offline  
#5 Old 10-23-2012
Registered Users
 
Ninja650R's Avatar
 
Join Date: Jun 2009
Location: Boiling Springs, SC
Vehicle: 2006 SLK350 Diamond Silver
Other Toys: 2007 Candy Red VFR800A
Posts: 29
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 1 Time in 1 Post
(Thread Starter)
Quote:
Originally Posted by Galo View Post
Did you put enough "lube" on the back of the pads where they touch the caliper pistons?
Thanks for the replies. I can't remember doing this step. I'll be checking this weekend to find any points that metal meets metal and will start with this idea.

Thanks again.
Ninja650R is offline  
Sponsored Links
Advertisement
 
Reply

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > Technical Information > Tires, Wheels, Brakes & Suspension

Bookmarks

Quick Reply
Message:
Options
Upload your files to MEGAUPLOAD
Upload your images to ImageShack

Register Now



In order to be able to post messages on the Mercedes Benz SLK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Weak Brakes After Start-Up motoservdog SLK R170 General Discussion 2 10-22-2012 12:22 PM
SlK55 09 model brakes ??? superchargerV8 AMGs 2 09-09-2012 10:48 PM
Questions for update brakes systems to Slk 55 AMG tzitzos Performance MODS for the R171 11 09-27-2011 06:15 PM

Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.