Front Disc Warranty

[Bolkowbob]

Hi I am a new member and out of total frustration I thought I would post my latest gripe with MB dealerships and the CS team.
I have a 2018 GLC 250D that has 15k on the clock. After a visit to the dealership to have a peeling paint job done and a quick check on the font brakes as they are juddering slightly I have now been told that the discs are warped and rusty and you guessed it, not covered under warranty, what a surprise.
Any one else had this issue and did you get it resolved under warranty?
Any advice on how to move on or is it a case of hand in pocket.
I even have the pain of knowing I also purchased an extra two years of dealership warranty that will probable be of no use.

Any help warmly welcome......

 

[00slk]

I may not be of much help but did you purchase the car recently off a dealer and were the disc's showing and signs of shuddering when you purchased the car? If they were they would still be obliged to replace them if it was noticed on the test drive. As for rusting I think many Mercedes disc's rust, especially after a wash if there not driven.

 

[Bolkowbob]

Thanks for the response. I have had the car for 18 months approx and it has just had a service at 13K with no problems so this has occurred recently.
I can see an imprint of a disc pad on one disc in two spots. I am suspicious of the adaptive cruse control as it brakes a lot harder, on occasion, than i would and will bring the car to rest with the brakes on so I am wondering if I am getting pad transfer onto the disc and this may be causing the problem?? Having said that the adaptive cruse is doing what it was designed for so I am curious if anyone else may have the same problem.

 

[LostKiwi]

Brakes are wear and tear items and no one covers them under warranty.
Driving habits can contribute to brake vibration - especially doing motorway speeds then stopping and holding the car on the brakes for a long period. Brake hold can also contribute to brake vibration. This is down to something called pad transfer which creates high spots on the disc where the wheel is held by the pad when hot.

 

[Wighty]

If the car hasn’t been used for extended periods during lockdown , the discs may well have corroded as may all makes of cars .

 

[Bolkowbob]

Thanks Wighty, you are correct I think the reference I made to rust in the first post was the statement made by the MB service technician. I have notice not only on this car but most cars I have had a light rust covering form on the discs if left for a period and that it will come off fairly shortly after the car is moved, I dont personalty think this is the issue but I may be wrong, I think it was more of a statement made bu the tech.

 

[peterws1957]

I can understand your frustration but as others have said brake discs won't be covered under a warranty. Probably the rust will come off during use or you can remove physically. If the warping is causing a problem the only solution is replacement, unless there is sufficient meat to allow skimming, which is not done much these days. At least you won't have to pay the eyewatering amount I had to on the CL!

 

[Uncle Benz]

If the imprint of the pad shape is visible on the disc it is the reason for the judder. It is caused by the car sitting for longish periods, but mostly by the car being parked with wet brakes. Washing the car and then leaving it is a very common cause. A short drive after washing is a good idea to keep this problem at bay. It isn’t just Mercedes, all makes with steel discs are susceptible to this

 

[Bolkowbob]

Thanks for the two replies. In reply to peterws1957. I have seen on several forums connected to MB ownership that warped discs and pads have been replaced by the dealerships all done under warranty. The warranty that MB offer for the first 36 months does not cover ware and tare on brakes however as this is not, clearly stated by the service manager I talked to, I have to ask what category of refusal does this fit into and why some dealerships offer the warranty replacement and others dont?
UncleBenz Are you saying that wet pads are causing more rust to form in the area under the pad than what would form over the rest of the disc in those circumstances?

 

[Uncle Benz]

Yes. In extreme cases the brakes can lock on, and release with a bang as you try to pull away

 

[Bolkowbob]

As there is an imprint on the disc it can only be one of two things, either the disc is raised at that point or depressed. If raised it would suggest pad has adhered to the surface or if depressed the pad has caused i higher localised corrosion, whats your thoughts?

 

[richlumb]

There is a known issue with the C class W205 disks warping (the W205 & X253 have some same components) the disks are 2 piece pressed together , MB was replacing under warranty but not sure with the GLC but may be worth asking if they are the same disks ?

 

[Bolkowbob]

Thanks for that richlumb, do you know if this was a recall item or did MB just wait until clients rocked up with their cars?

Do you know of anyone who had it done?

Dose anybody else know if the discs on the W205 are the same as that on the X253?

Having fun with this, nothing much else to do its pi..........down.

 

[richlumb]

It wasn’t a recall they only honoured it with mileage and time etc , I had a C class that had every issue known to MB and it had 3 sets of disks and needed a 4th when I got shut ( with only 50k on clock) for my now GLC, I’d be interested in finding out as well if they are the same

 

[Flyinspanner]

Maybe buy discs elsewhere, EBC or another good make?

 

[LostKiwi]

Maybe buy discs elsewhere, EBC or another good make?

I wouldn't touch EBC after previous experiences.
YMMV.

 

[Bolkowbob]

Thanks for the replies, Richlumb hope someone comes back with that info, my GLC has done 15k so not happy this could be a costly process and I find it hard to believe that a 40K car that is very well engineered should have an issue with brake discs, they should be capable of withstanding normal road use and not have to worry about wet conditions. I am getting the feeling from the dealers, after a few calls to a few that they are wise to the problem and are no longer offering to do warranty repairs on the discs,
maybe MB has put the block on it. My dealer is blaming it on "environmental conditions" I think global warning has caught up with GLC!!!

 

[Wighty]

Thanks for the replies, Richlumb hope someone comes back with that info, my GLC has done 15k so not happy this could be a costly process and I find it hard to believe that a 40K car that is very well engineered should have an issue with brake discs, they should be capable of withstanding normal road use and not have to worry about wet conditions. I am getting the feeling from the dealers, after a few calls to a few that they are wise to the problem and are no longer offering to do warranty repairs on the discs,
maybe MB has put the block on it. My dealer is blaming it on "environmental conditions" I think global warning has caught up with GLC!!!

I think the dealer will blame anything and everything to make you go away and stop them paying for it buddy

 

[Bolkowbob]

Lovely car shame about the service.... Its sad when you buy something like this to be let down by the human element if only Mr Benz took the time to see how bad the dealers are and fix it, he may have some happy customers. Then again pig might fly