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2015 GLK350 Brakes & Rotors Yearly Replacement

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GLK-Class (X204) Discuss the upcoming GLK-Class. Models include GLK 350.

2015 GLK350 Brakes & Rotors Yearly Replacement

 
Old 03-13-2019, 12:02 PM
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GLK350
2015 GLK350 Brakes & Rotors Yearly Replacement

Hello MBWorld,

I need your input on a situation with my GLK350's brakes and rotors. Here are some of the concerns based on facts. The vehicle was manufactured in January 2015. The front brakes and rotors were replaced in April 2015 at 1155 miles. I purchased the vehicle in June 2015 as a pre-certified vehicle from the MB Dealership with roughly 1500 miles. Six months later, January 2016, the front brakes and rotors were warped again and replaced within the 12 months/12,000 warranty. In December 2016, the rotors were warped again and replaced by MB. In March 2017, the rotors were warped again and replaced (this time as a courtesy) by MB. Last November 2018, the rotors became warped again and MB sent me away. I took my vehicle to a MB repair shop, and they in turn, sent me back to the dealership after reviewing the history of the rotors and breaks. This time I had to contact MB Corporate for guidance. MB Corporate along with the General Manager of my local MB Dealership have agreed to cover 1/2 of the cost this time around.

My understanding is there was a previous owner who, for some reason or another, chose not to keep this vehicle, and I'm wondering if it had something to do with the warped rotors being replaced at 1155 miles. I know the frequent replacements of the rotors are not due to normal wear and tear of vehicle. My MB Dealership has informed me that my warranty is over, and they refused to assist me with the issue of continuous warping of the rotors. My question is what would you do?

SRich
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Old 03-13-2019, 01:27 PM
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You're not the first, neither the last, with warping issues. Common theme on the portly GLKs with undersized brakes (in my opinion).

MB-brand discs will be a softer alloy than most others, which is why the issue rears its ugly head so often. In 91K miles, my GLK has gone through 3 sets of pads and rotors. You can have them replaced at an Indie shop with higher grade metal discs and ceramic pads like many have done, or replace them yourself like many (including myself) have done.

A side issue that may or may not apply: is the warping on both sides or just one? If just one, consider having that caliper replaced as well. That's where I'm at currently. I don't want to do a 4th set of pads & rotors that only last 5-10K miles before warping again. I'm living with it for now and trying to baby them until I decide to either go with bigger discs and pads from an AMG vehicle (see separate thread "AMG brakes on a GLK") or just replace the caliper(s) when doing the brakes again.

You're not alone, so there's that...
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Old 03-13-2019, 09:57 PM
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Originally Posted by SRich View Post
Hello MBWorld,

I need your input on a situation with my GLK350's brakes and rotors. Here are some of the concerns based on facts. The vehicle was manufactured in January 2015. The front brakes and rotors were replaced in April 2015 at 1155 miles. I purchased the vehicle in June 2015 as a pre-certified vehicle from the MB Dealership with roughly 1500 miles. Six months later, January 2016, the front brakes and rotors were warped again and replaced within the 12 months/12,000 warranty. In December 2016, the rotors were warped again and replaced by MB. In March 2017, the rotors were warped again and replaced (this time as a courtesy) by MB. Last November 2018, the rotors became warped again and MB sent me away. I took my vehicle to a MB repair shop, and they in turn, sent me back to the dealership after reviewing the history of the rotors and breaks. This time I had to contact MB Corporate for guidance. MB Corporate along with the General Manager of my local MB Dealership have agreed to cover 1/2 of the cost this time around.

My understanding is there was a previous owner who, for some reason or another, chose not to keep this vehicle, and I'm wondering if it had something to do with the warped rotors being replaced at 1155 miles. I know the frequent replacements of the rotors are not due to normal wear and tear of vehicle. My MB Dealership has informed me that my warranty is over, and they refused to assist me with the issue of continuous warping of the rotors. My question is what would you do?

SRich
Hmmmn I agree with the first reply. The brakes must be underpowered to create so much heat to cause warping so quickly.

If I were you I would use a better aftermarket rotors like ebc usr sport rotors or r1 concepts geomet rotors that are crossdrilled and slotted and match that wixthceramic pads.

Both those will cause less heat and give a lonnger lifetime than what you have experienced.


Still your situation concerns me. You don't feel a sticking caliper? Or over the top brake pressure?
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Old 03-13-2019, 11:57 PM
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I replaced my pads and rotors with centric pads and centric cryo rotors at about 40k miles. I'm at 95k now and they are still working fine. I live in CO and use my car primarily to go up and down into the mountains from the city.
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Old 03-14-2019, 08:27 AM
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Thank you Mogulman! I'm checking on those parts now.
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Old 03-14-2019, 08:39 AM
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BTW. I had some bad front brake warping before I replace my front brakes at 40k. The pads I used were the posi-quiet Cerramic.
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Old 03-14-2019, 08:50 AM
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Thanks again Mogulman! My Mercedes GLK350 was my dream car purchase; yet every year since the purchase there has been a rotor problem. I'm somewhat discouraged because this has never occurred with any other vehicles I have owned. If I'm to invest in brakes and rotors, I definitely want to get really good wear and tear out of them. I do not want a yearly brake and rotors expense. So, I thank you for the info on the Centric brakes and rotors. I'll mention these to my mechanic.
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Old 03-14-2019, 08:52 AM
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Looking up the centric cryo rotors, i would highly recommend either the ebc jltimax or the r1 concepts drilled and slotted rotors.

The centric are still a solid disc, and with the issues yiuve been having you want to dissipate as much heat as possible to prevent any kind of warping.

Ebc rotors are solid. Expensive but really one of the best in the industry. I run them on a much heavier gl and I tow at times and they are flawless.

https://www.autoanything.com/brakes/ebc-ultimax-rotors

You can still pair them with the centric pads, but any ceramic pad manufacturer will do, and I personally trust the brembo ceramic or akebono pads a bit more...

The r1 concepts carbon geomet slotted and drilled rotors is a company I found through other forum members here who have bought them and reviewed them. The rotors aesthetically look solid, performance reviews seem happy and they're a great price. From what I read I wouldn't hesitate to order them for my next rotor job.
https://www.r1concepts.com/detail_ca...otor+silver+++

Hope it helps!
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Old 03-14-2019, 08:59 AM
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Thank you Kombifan!
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Old 03-14-2019, 05:37 PM
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Do you often slow to a rapid stop from 40-55 mph, I think the rapid heating then stoping at a light while the pad is in one place, on the rotor, warps them. Iíve since creaped along after stopping and have not warped a rotor in 15 years
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Old 03-14-2019, 08:13 PM
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My original rotors lasted aroudn 60k miles.
Second MB set lasted 14k miles upfront and warped
I got Zimmermans from FCP Euro as they have lifetime warranty, cheaper than MB, too...have about 10k miles on them. So far so good.
Btw, swapping rotors is super easy, 1 hour tops.
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Old 03-14-2019, 08:14 PM
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Originally Posted by Mmr1 View Post
Do you often slow to a rapid stop from 40-55 mph, I think the rapid heating then stoping at a light while the pad is in one place, on the rotor, warps them. Iíve since creaped along after stopping and have not warped a rotor in 15 years
What you talking about I think is not leaving pad deposits on the rotor when coming to stop with pads hot. I think MB rotors are just made out of crap.
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Old 03-14-2019, 08:23 PM
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Could it be they are designed for stopping power vs a harder material that would not stop as well ? Sure you can get brake pads that donít leave dust, I believe you also get a loss is stopping power. Iím just guessing as to the mb glk brake issue.
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Old 03-14-2019, 08:42 PM
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Originally Posted by NYCGLK View Post
My original rotors lasted aroudn 60k miles.
Second MB set lasted 14k miles upfront and warped
I got Zimmermans from FCP Euro as they have lifetime warranty, cheaper than MB, too...have about 10k miles on them. So far so good.
Btw, swapping rotors is super easy, 1 hour tops.
Zimmerman makes the oe mb rotors for most models; so unless zimmerman knows something and changed the formula for their own brand rotors it should handle the same as the one with the star logo.

Zimmermans are great though!!

+1 on fcp euro!

mb rotors are way too soft...mb makes the rotors expendable....

Last edited by kombifan; 03-14-2019 at 08:44 PM.
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Old 03-14-2019, 09:04 PM
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Originally Posted by Mmr1 View Post
Could it be they are designed for stopping power vs a harder material that would not stop as well ? Sure you can get brake pads that donít leave dust, I believe you also get a loss is stopping power. Iím just guessing as to the mb glk brake issue.
Considering they use the same rotor for left and right side (with angled vents) ... I don't think there is much more than the cost considerations.
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Old 03-15-2019, 08:40 AM
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Thank you for asking Mmr1. No, I cannot recall having to abruptly stop. I'm a "senior," cautious driver and I'm mindful of stopping at red lights especially since it was brought to my attention by the MB mechanic about three warped rotors ago. Because of that, I've been creeping along as you've mentioned. I've had my GLK350 since June 2015 and I have less than 40K miles on it.
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Old 03-15-2019, 09:03 AM
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Whatís the wear pattern of the rear brakes, it could be a bad proportioning valve is putting to much braking to the fronts, you should have somewhere between 60 and 65% to the fronts, and the rears should wear out at about the same time. From what youíve said your just wearing out the front brakes , if so itís also strained and worn front suspension components. It should be under warranty.

I had an issue with my fronts, I first noticed a darkened, left front dusty rim, my left front caliper was sticking, I got a cheap IR thermometer and recorded the increased temperature after hard stops, and proved it to MB who fixed it free. (I also had a thermal camera) and that was further proof of a sticking caliper. Maybe itís not the rotors or pads ! . If your not wearing out the rear brakes go see your mb service. If they refuse to help you will have to do what I did to prove it.

Last edited by Mmr1; 03-15-2019 at 09:10 AM.
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Old 03-15-2019, 09:35 AM
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When my vehicle was under the brake warranty, MB replaced the rotors and brakes (front and back). Each time thereafter, the back brakes have been just fine. Back when the rotors warped the first time I was noticing an excessive amount of brake dust on the front driver's tire. I reported that to MB and they said the brakes were thoroughly checked, calipers were fine, and there was nothing to justify there was excessive brake dust. They did, however, clean my brake pads and put some anti-squeal lubricant on them, but it hasn't stopped the brake dust on that particular tire.
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Old 03-15-2019, 11:07 AM
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Thatís like my issue, but I proved a bad caliper by Infrared thermometer and thermal imaging. Do rear brake pads last as long as front pads ?
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Old 03-15-2019, 11:11 AM
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I'm assuming they are fine. I was told by the MB mechanic that it was just my front brakes.
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Old 03-15-2019, 03:14 PM
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Your not being told the whole story, I think. It sounds like your rear brakes are ok, and not wearing much or at all, the front brakes are doing all the work, So the fronts are improperly balanced by the proportioning valve or your calipers are not fully releasing. You have proof with the left front wheel being more dirty of a bad caliper. You have to talk to your dealer and get a higher level of diagnosis . Like measurements of front and rear pads to prove the fronts are defective. A braking test. You have to figure it out , your dealer wonít. You have to know the wear rate, or thickness, of all the pads to know where to look. All the mechanic has been doing is replacing pads and rotors, it needs to be much more. From what you say, the rear brakes may be doing nearly nothing.
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