Uneven Brake Pad Wear

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Dec 30, 2024 | 02:02 PM

Vladimir Livson

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2021 Mercedes GLB250 4Matic

Uneven Brake Pad Wear

I just replaced my front brake pads and rotors and found that inner and outer pads did not wear evenly by a factor of 3. Inner pads were 3mm thick and outer ones were 9mm think. Rotors were worn out on inside wall as well. When i changed rear brakes and rotors last spring, the difference was there, but not to this degree.

I have never seen such a huge difference in brake pad wear. Is it common for MB?

Dec 30, 2024 | 10:46 PM

Odd Piggy

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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320

That’s not common. I don’t usually check my inner pads until the outers are below 50%. My E Class had wear indicators on both inner and outer pads. My C Class didn’t but pads on all 4 wore perfectly event.

Thanks. I’ll have to change my routine on the GLB & the GLAs.

Uneven wear could be caused by the caliper slide surfaces getting rusty and it not moving smoothly or binding.

Dec 31, 2024 | 09:36 AM

Vladimir Livson

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2021 Mercedes GLB250 4Matic

Front passenger side inner pad has wear indicator. Rear pads do not have any.

Dec 31, 2024 | 09:42 AM

Vladimir Livson

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2021 Mercedes GLB250 4Matic

Quote:

Originally Posted by Odd Piggy

Slide pins were free moving and had no rust on them, however, not a lot of grease inside the rubber boots. The grease was pure white, never seen that color grease before. I typically use silicone grease.

Dec 31, 2024 | 01:02 PM

Odd Piggy

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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320

Quote:

Originally Posted by Vladimir Livson

Front passenger side inner pad has wear indicator. Rear pads do not have any.

GLB/GLA are definitely down at the bottom of the ladder. While it seems to be a fairly competent vehicle (70k+, 50k+, 25k on ours), I’m going to have to treat it more like our domestics.

Quote:

Originally Posted by Vladimir Livson

I think the caliper grease is white lithium grease. I have a tube made by Lubriplate that I’ve used for years. I don’t think the type of grease is critical, but I have heard that different formulas should not be mixed.