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I just got a used 2013 w221 with 55,000 miles on it. The front break and rotors were replaced by the dealer. Have only driven the car 100 miles and I have noticed that the driver side break is wearing uneven on the rotors.
Car drives great, breaks well, does not vibrate, does not pull.
And still I’ll I cannot understand why they would wear like this. Attached is a image of the from driver side rotor.
When u scrape your nail on the rotor it feels as if the great have never touched the center area.
I just got a used 2013 w221 with 55,000 miles on it. The front break and rotors were replaced by the dealer. Have only driven the car 100 miles and I have noticed that the driver side break is wearing uneven on the rotors.
Car drives great, breaks well, does not vibrate, does not pull.
And still I’ll I cannot understand why they would wear like this. Attached is a image of the from driver side rotor.
When u scrape your nail on the rotor it feels as if the great have never touched the center area.
Wish I could help with your question. My brakes and rotors are new about 10,000 miles ago and they are starting to shudder a bit; vibrate a bit when I brake and I am VERT easy on brakes. 'very easy. I wonder why that happens.
I would watch those contact bands over a couple hundred miles and see if they are growing or not. Or, since the dealer installed the pads, take it there and ask them why the pads on the driver side are not making full contact.
pads arent making full contact... could just be the need to wear in. drive it more and see if that stops, or bring it back you could have a bad caliper.
I would watch those contact bands over a couple hundred miles and see if they are growing or not. Or, since the dealer installed the pads, take it there and ask them why the pads on the driver side are not making full contact.
Thanks for your reply. So after driving another 75 miles I did notice that the bands are narrowing. I called the dealer and they said this happens sometimes and if I wanted they would take out the brake pad and sand it down a little.
I have not herd of this before. Does this make sense to you?
New photo from today.
Thanks for your reply. So after driving another 75 miles I did notice that the bands are narrowing. I called the dealer and they said this happens sometimes and if I wanted they would take out the brake pad and sand it down a little.
I have not herd of this before. Does this make sense to you?
New photo from today.
Just keep driving it. Do a couple of moderate stops.
JEEZE I would have the pads remvoed and looked at....
Sanding pads makes them flat again in the thinking they are not flat and only contact on outer edges...
I have never seen this.... as normally part of doing brake is to bed them in which means use the brakes hard so the pads form to the rotors and have good surface contact.
You need to bed in the rotors by using this procedure...
find an empty road where you can do this
.
Perform 3-4 medium stops from 45mph. Slightly more aggressive than normal braking. You don't need to come to a complete stop for each pass. This brings the brake rotors up to temperature so they are not exposed to sudden thermal shock.
Make 10-20 aggressive stops from 45mph down to 5mph. For this set of semi-stops, you want to be firm and aggressive, but not to the point where ABS activates and the wheels lock up. It's important to note that you don't come to a complete stop but rather a semi-stop (~15mph). Accelerate back up to 60mph as soon as you slowed down to your semi-stop.
The brake pads and brake rotors are extremely hot at this point and sitting on one point will imprint the pad material onto the surface unevenly. This can cause vibration and uneven braking.
You may notice that your brakes will start fading, and sometimes smoke, after the 6th or 7th pass. This fade will stabilize and will gradually recess once your brakes have cooled down to normal operating temperatures. Drive carefully as your brakes may feel softer for the next few minutes.
Try not to come to a complete stop and find a stretch of road where you can coast for 5-10 minutes, preferably without using your brakes.
07-05-2019, 08:58 PM
