New brake pads need new rotors???? - Mercedes Benz SLK Forum

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

 6Likes
Reply
 
LinkBack Thread Tools
#1 Old 04-30-2012
Registered Users
 
Join Date: Feb 2008
Location: Orlando
Vehicle: 2012 SLK 350
Posts: 30
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Question New brake pads need new rotors????

Hello,

I want to change my break pads to minimize dust. Have read most of the threads about it and i decided to go with Porterfield R4S Pads.
I called the shop today to ask for a quote to install them and they told me i need to get new rotors as well if i am changing the pads.
Is this true?

Last edited by jbanks15; 05-27-2016 at 08:29 PM.
Aranofly is offline  
Sponsored Links
Advertisement
 
#2 Old 04-30-2012
Founding Member #2

 
etyu's Avatar
 
Join Date: Jun 2006
Location: Orange County, CA
Vehicle: 2008 SLK 55
Posts: 19,390
Country:
Chats: 11
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Thanks: 4,571
Thanked 3,141 Times in 2,269 Posts
Garage
No.

They should do the measurements first on the rotors with a caliper and see if it is within the specs or not, then the mechanic can recommend if a rotor/disc change is needed or not. Do a search on the different values of the brake disc as measured by caliper (in mm) for the different R171 models (do a search on threads started by Easty).

Eddy



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Pewter(cubanitsilber metallic)/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package; Designo Black Leather Cover on e-brake handle(Thank you Bill T), SmartTop v3.x, John's 3BFM, M113 AMG OEM air filters, Modified R170 ant., clear side-markers & front parking lamps w/error-free LEDs, chromed front & rear turn indicator lamps, steel mesh at battery bay cover & cabin air intake, sock-over-seatbelt buckles, belt-loop guide protectors, Lamin-X fog lamp protectors, bilateral rear fog lamps enabled, AMG crest on gear shift knob
etyu is offline  
#3 Old 04-30-2012
Founding Member #2

 
etyu's Avatar
 
Join Date: Jun 2006
Location: Orange County, CA
Vehicle: 2008 SLK 55
Posts: 19,390
Country:
Chats: 11
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Thanks: 4,571
Thanked 3,141 Times in 2,269 Posts
Garage
Here's the link: https://www.slkworld.com/80276-post2.html

Eddy



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Pewter(cubanitsilber metallic)/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package; Designo Black Leather Cover on e-brake handle(Thank you Bill T), SmartTop v3.x, John's 3BFM, M113 AMG OEM air filters, Modified R170 ant., clear side-markers & front parking lamps w/error-free LEDs, chromed front & rear turn indicator lamps, steel mesh at battery bay cover & cabin air intake, sock-over-seatbelt buckles, belt-loop guide protectors, Lamin-X fog lamp protectors, bilateral rear fog lamps enabled, AMG crest on gear shift knob
etyu is offline  
The Following 2 Users Say Thank You to etyu For This Useful Post:
 
#4 Old 05-01-2012
Registered Users
 
Join Date: Apr 2007
Location: LAS VEGAS
Vehicle: 07SLK350
Other Toys: 2010 GLK350/2001 RX300
Posts: 902
Country:
Chats: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 220
Thanked 102 Times in 86 Posts
Send a message via AIM to QSHIP Send a message via Skype™ to QSHIP
If your mileages close to 40K MB recommend to change pads and rotors.most probably you just need the front axle only. Also you may as well change your brake fluid to get a fresh start.
QSHIP is offline  
#5 Old 05-01-2012
Registered Users

 
sokoloff's Avatar
 
Join Date: Jun 2009
Location: Ocean Isle Beach, NC
Vehicle: 2003 SLK320 31,000 miles
Posts: 1,314
Country:
Chats: 3
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Thanks: 27
Thanked 231 Times in 161 Posts
Garage
Quote:
Originally Posted by QSHIP View Post
If your mileages close to 40K MB recommend to change pads and rotors.most probably you just need the front axle only. Also you may as well change your brake fluid to get a fresh start.
AFAIK Mercedes does not recommend a change of rotors at any specific mileage. Rotors are changed when they are near their minimum spec or are warped, overheated, etc. That can vary widely in mileage from driver to driver. Measure them and make your decision. Brake (not break) fluid should be done every two years regardless of any brake work that you do or don't do.

Len

Len
2003 SLK320 40,000 miles - now lives in Tucson with my daughter
1959 220S Cabriolet - sold - now lives in Malta
1983 240D 351,000 miles original owner - sold
1999 E300D 215,000 miles
2014 Smart electric 17,000 miles
2014 Smart electric 9,000 miles
sokoloff is offline  
The Following User Says Thank You to sokoloff For This Useful Post:
#6 Old 05-02-2012
Registered Users
 
Join Date: Feb 2008
Location: Orlando
Vehicle: 2012 SLK 350
Posts: 30
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Thank for the replies guys.
My car only has 17,000 miles so i dont believe it needs new rotors. -- What i understood from the guy at Meineke is that if i was going to put new ceramic pads, i needed to put new rotors as well since they wear differently???
Just want to make sure i'll be ok just changing the pads
Aranofly is offline  
#7 Old 05-02-2012
Founding Member #2

 
etyu's Avatar
 
Join Date: Jun 2006
Location: Orange County, CA
Vehicle: 2008 SLK 55
Posts: 19,390
Country:
Chats: 11
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Thanks: 4,571
Thanked 3,141 Times in 2,269 Posts
Garage
IIRC, Arno (PropDr) has Porterfields on his 55 and I don't recall him mentioning a change of the rotors/discs.

Eddy



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Pewter(cubanitsilber metallic)/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package; Designo Black Leather Cover on e-brake handle(Thank you Bill T), SmartTop v3.x, John's 3BFM, M113 AMG OEM air filters, Modified R170 ant., clear side-markers & front parking lamps w/error-free LEDs, chromed front & rear turn indicator lamps, steel mesh at battery bay cover & cabin air intake, sock-over-seatbelt buckles, belt-loop guide protectors, Lamin-X fog lamp protectors, bilateral rear fog lamps enabled, AMG crest on gear shift knob
etyu is offline  
#8 Old 05-02-2012
aka John

 
UK-C200's Avatar
 
Join Date: May 2008
Location: Richmond, Tx
Vehicle: LHD Black SLK350, LHD Firemist SLK55
Other Toys: Nacra F18
Posts: 13,012
Country:
Chats: 1143
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 30 Post(s)
Thanks: 1,712
Thanked 2,920 Times in 2,028 Posts
Never heard of that before - rotors either wear evenly, or don't - if they are warped, they need to be replaced - or if they are below minimum spec, which as I recall was 3mm.



UK-C200 is offline  
#9 Old 05-02-2012
Banned
 
Mustang Sally's Avatar
 
Join Date: Nov 2011
Location: Lexington, Ky
Vehicle: 2010 SLK 350 Sports Pkg
Other Toys: OS Max 55 AX
Posts: 87
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 24 Times in 17 Posts
Get the Akebono Euros. Amazon has them. You can easily eyeball the rotors to determine if they need replacement. Usually if you haven't worn the old pads down to the metal, the rotors will be OK.
Mustang Sally is offline  
#10 Old 05-03-2012
Registered Users

 
sokoloff's Avatar
 
Join Date: Jun 2009
Location: Ocean Isle Beach, NC
Vehicle: 2003 SLK320 31,000 miles
Posts: 1,314
Country:
Chats: 3
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Thanks: 27
Thanked 231 Times in 161 Posts
Garage
Quote:
Originally Posted by UK-C200 View Post
Never heard of that before - rotors either wear evenly, or don't - if they are warped, they need to be replaced - or if they are below minimum spec, which as I recall was 3mm.
That's typically the minimum specs on pads, 2 or 3 mm. Rotors are much more, typically in the 25mm range. I can look it up if anyone really needs to know. Just going by my sedan, pads are 2mm all around, front rotors are 25.4, rear rotors are 8.3 - all in mm.

Len

Len
2003 SLK320 40,000 miles - now lives in Tucson with my daughter
1959 220S Cabriolet - sold - now lives in Malta
1983 240D 351,000 miles original owner - sold
1999 E300D 215,000 miles
2014 Smart electric 17,000 miles
2014 Smart electric 9,000 miles
sokoloff is offline  
#11 Old 05-03-2012
Registered Users
 
Join Date: Apr 2012
Location: SF Bay Area California
Vehicle: 2006 SLK 280 Black
Other Toys: None
Posts: 627
Country:
Chats: 0
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 101 Post(s)
Thanks: 9
Thanked 36 Times in 32 Posts
Garage
If rotors are flat and greater than the service limit (for my R170, the spec says 23.5mm is the service limit), then fitting new pads does not require new rotors.

Of course, if the rotors are scored they should be resurfaced for the new pads, which might bring them under the service limit if they're close. For instance, my pads have 50% material left but at 123K miles, the rotors are at the service limit—the next time I put pads in, I'll change the rotors too.

Any service shop telling you differently is trying to make an extra buck, IMO.
Godfrey is offline  
#12 Old 05-03-2012
Founding Member #2

 
etyu's Avatar
 
Join Date: Jun 2006
Location: Orange County, CA
Vehicle: 2008 SLK 55
Posts: 19,390
Country:
Chats: 11
Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 345 Post(s)
Thanks: 4,571
Thanked 3,141 Times in 2,269 Posts
Garage
Quote:
Originally Posted by sokoloff View Post
That's typically the minimum specs on pads, 2 or 3 mm. Rotors are much more, typically in the 25mm range. I can look it up if anyone really needs to know. Just going by my sedan, pads are 2mm all around, front rotors are 25.4, rear rotors are 8.3 - all in mm.

Len
See post #3 with link above.

Eddy



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Pewter(cubanitsilber metallic)/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package; Designo Black Leather Cover on e-brake handle(Thank you Bill T), SmartTop v3.x, John's 3BFM, M113 AMG OEM air filters, Modified R170 ant., clear side-markers & front parking lamps w/error-free LEDs, chromed front & rear turn indicator lamps, steel mesh at battery bay cover & cabin air intake, sock-over-seatbelt buckles, belt-loop guide protectors, Lamin-X fog lamp protectors, bilateral rear fog lamps enabled, AMG crest on gear shift knob
etyu is offline  
#13 Old 05-04-2012
Registered Users
 
Join Date: Apr 2007
Location: LAS VEGAS
Vehicle: 07SLK350
Other Toys: 2010 GLK350/2001 RX300
Posts: 902
Country:
Chats: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Thanks: 220
Thanked 102 Times in 86 Posts
Send a message via AIM to QSHIP Send a message via Skype™ to QSHIP
What I have noticed about the MB rotors installed on mine was like pre-matured grooves showing on the rotors like it was coming from the pads and this was as early as 2k.
QSHIP is offline  
#14 Old 05-09-2012
Registered Users
 
MidLifeSolution's Avatar
 
Join Date: May 2012
Location: Massachusetts
Vehicle: 2004 SLK 320
Other Toys: 2011 Mercedes E350
Posts: 36
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 4
Thanked 5 Times in 5 Posts
Garage
Rotors don't wear unless serviced?

I thought rotors don't wear, just the pds wear? To my (limited) knowledge, the only way a rotor will reduce in thickness is if they are "turned" (aka "planed" or "shaved") to remove grooves. This is when you have to pay attention to the minimum thickness since turning the rotor removes surface.

Do I misunderstand?
MidLifeSolution is offline  
#15 Old 05-09-2012
Registered Users

 
sokoloff's Avatar
 
Join Date: Jun 2009
Location: Ocean Isle Beach, NC
Vehicle: 2003 SLK320 31,000 miles
Posts: 1,314
Country:
Chats: 3
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Thanks: 27
Thanked 231 Times in 161 Posts
Garage
Yes, you misunderstand.

Pads rub against the rotors wearing both parts. Typically rotors will last two or more sets of pads, but the rotors do wear, faster with some pads. The general rule of thumb is that Mercedes rotors should never be turned because they typically don't ever need to be turned plus they hardly have enough "meat" on them to make turning worth it. I have owned Mercedes cars for 30 years and have never had to have a rotor turned. So there are specs for both pads and rotors. You can see the wear on the rotor by observing the little ridge that forms near the edge.

Len

Len
2003 SLK320 40,000 miles - now lives in Tucson with my daughter
1959 220S Cabriolet - sold - now lives in Malta
1983 240D 351,000 miles original owner - sold
1999 E300D 215,000 miles
2014 Smart electric 17,000 miles
2014 Smart electric 9,000 miles
sokoloff is offline  
#16 Old 05-09-2012
Registered Users
 
MidLifeSolution's Avatar
 
Join Date: May 2012
Location: Massachusetts
Vehicle: 2004 SLK 320
Other Toys: 2011 Mercedes E350
Posts: 36
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 4
Thanked 5 Times in 5 Posts
Garage
The Outer Limits

Thanks for clarifying! It all comes back to me - the outer ridge that forms is the clue!
MidLifeSolution is offline  
#17 Old 05-18-2012
Registered Users
 
porscheguy944's Avatar
 
Join Date: Nov 2011
Location: ANDOVER MN
Vehicle: 2005 SLK55 AMG
Other Toys: LOTUS ESPRIT TWIN TURBO V-8
Posts: 37
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Garage
Quote:
Originally Posted by MidLifeSolution View Post
Thanks for clarifying! It all comes back to me - the outer ridge that forms is the clue!
What are available for brake pads other than the factory pads?
I have a 2005 SLK55 AMG with out the optional w030 performance option.
I have called around today and found out the high dusting factory pads from MB are exspesive and make alot of black dust that sticks to everything.
I went on line and saw EBC yellow pads and bunch of other options out there.
BUT WHICH ONES TO BUY??????

WHO HAS HAD GOOD LUCK WITH ANY OTHER PAD??
Where did you get them and what part numbers? At what price point?
Were they any better worse or the same as factory pads??
porscheguy944 is offline  
#18 Old 04-14-2016
Registered Users
 
Join Date: Feb 2012
Location: Freeport FL in Florida's Beautiful Panhandle
Vehicle: 2001 SLK 230
Posts: 44
Country:
Chats: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Thanks: 20
Thanked 16 Times in 3 Posts
What are the Specs for Rotors?

Quote:
Originally Posted by sokoloff View Post
Yes, you misunderstand.

Pads rub against the rotors wearing both parts. Typically rotors will last two or more sets of pads, but the rotors do wear, faster with some pads. The general rule of thumb is that Mercedes rotors should never be turned because they typically don't ever need to be turned plus they hardly have enough "meat" on them to make turning worth it. I have owned Mercedes cars for 30 years and have never had to have a rotor turned. So there are specs for both pads and rotors. You can see the wear on the rotor by observing the little ridge that forms near the edge.

Len
I'd like to know the spec for rotors for my 2001 R170 449. I saw you mentioned the rotor specs in a communication (quoted) that there are rotor specs but I can't find them anywhere in my book and online. (Pelican Parts didn't know and told me to ask in the SLK Forum.)

Please tell me what they are and where to look for information like this. Thank you!
CushyCouple is offline  
#19 Old 04-14-2016
Registered Users

 
sokoloff's Avatar
 
Join Date: Jun 2009
Location: Ocean Isle Beach, NC
Vehicle: 2003 SLK320 31,000 miles
Posts: 1,314
Country:
Chats: 3
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Thanks: 27
Thanked 231 Times in 161 Posts
Garage
Quote:
Originally Posted by CushyCouple View Post
I'd like to know the spec for rotors for my 2001 R170 449. I saw you mentioned the rotor specs in a communication (quoted) that there are rotor specs but I can't find them anywhere in my book and online. (Pelican Parts didn't know and told me to ask in the SLK Forum.)

Please tell me what they are and where to look for information like this. Thank you!
Here are the specs for my 2003. I would think yours ought to be the same.

Front rotors - 22.4 mm
Rear rotors - 7.3 mm
Pads - 2 mm for all
Brake sensor will typically trip about 3 mm.

Len
2003 SLK320 40,000 miles - now lives in Tucson with my daughter
1959 220S Cabriolet - sold - now lives in Malta
1983 240D 351,000 miles original owner - sold
1999 E300D 215,000 miles
2014 Smart electric 17,000 miles
2014 Smart electric 9,000 miles
sokoloff is offline  
#20 Old 04-14-2016
Premium Member
 
Gordosoar's Avatar
 
Join Date: Feb 2016
Location: Beverly Hills Florida
Vehicle: 2001 SLK 320
Other Toys: 1100 Yamaha customized.
Posts: 435
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 107 Post(s)
Thanks: 75
Thanked 18 Times in 14 Posts
Quote:
Originally Posted by Aranofly View Post
Hello,

I want to change my break pads to minimize dust. Have read most of the threads about it and i decided to go with Porterfield R4S Pads.
I called the shop today to ask for a quote to install them and they told me i need to get new rotors as well if i am changing the pads.
Is this true?
If I shop tells you that you need new rotors after 17,000 miles they are trying to sell you something you don't need. This is typical of almost every shop I know of. As long as they are not warped, and you will know this if you feel the car braking unevenly as you come to a slow stop, you most likely don't need rotors.
And if you did the car would tell you so anyway.
For pads,, go with the red or green from EBC.
Just my 2 cents.
lovemyslk likes this.
Gordosoar is offline  
Sponsored Links
Advertisement
 
Reply

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

Bookmarks

Tags
breaks, pads, rotors

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
Replace ROTORS and PADS 05 SLK mrdougie SLK R171 Class DIY 27 01-11-2015 10:49 AM
SLK 350 replacement Brake pads & rotors SuzaFan Performance MODS for the R171 12 04-14-2014 06:20 PM
Wagner pads and rotors for 98SLK230 garricks Tires, Wheels, Brakes & Suspension 1 05-21-2011 08:40 AM
SLK 230, break pads... HBK SLK R170 General Discussion 4 11-07-2008 04:44 PM
Break Pads not changed in Service C GregoryGR SLK R171 General Discussion 6 11-29-2007 08:23 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.