E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

Very uneven rear brakepad wear?!

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Old 03-26-2011, 09:55 AM
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'01 W210 E320 CDI
Very uneven rear brakepad wear?!

My car had squeeky brakes and I noticed the rear pads were almost gone so I did them today. The rotors are fine, I got OEM pads from the dealer and the pads that were on the car were also OEM (markings on the back).

The pads on the outside are completely gone but the inner pads are barely worn, is this a common issue or is something worng? See pics;

Outer and Inner pad comparison:


Inner and Brand new pad comparison:


I used copper grease on the sides of the pads and on the caliper contact area. My car does not have wear indicators on the rear and as you can see the VIN-ordered new pads have no slot for them anymore...
Old 03-26-2011, 10:59 AM
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SL600 r230, SL600 r129,, SL500 r230, ML320, C280 Sport, 190e 2.3 16V (2)
When you slide the pads in, do they slide freely back and forth? If not, scrape and clean the heck out of the area the pads would slide on.

If they do slide easily, then your caliper needs rebuilding.
Old 03-26-2011, 11:15 AM
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'01 W210 E320 CDI
Originally Posted by waybomb
When you slide the pads in, do they slide freely back and forth? If not, scrape and clean the heck out of the area the pads would slide on.

If they do slide easily, then your caliper needs rebuilding.
Yes I scraped and cleaned the area inside the caliper, there was a lot of rust and dirt inthere also inbetween the caliper and the rotor. Scraped that all out and used brake cleaner. When I push one piston back in, the opposite piston comes out so there's fluid going round and the system is working. The new pads slide in easy. You can slam the brakes without touching the steering wheel and the car goes into a straight line. I'll keep an eye on it and see what happens...
Old 03-27-2011, 12:37 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Did you check

the rotor thickness? You could have a smooth rotor that is still below min thickness.
Old 03-27-2011, 02:31 PM
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what condition is your brake fluid in? As of rigt now it seems like either your rotor is worn unevenly or one of the pistons are stuck.
Old 03-27-2011, 10:14 PM
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1997 E300D
My guess would be that the piston that should have been pushing on the pad that was not worn down, was seized in the caliper. I doubt that it will heal itself, so a new or rebuilt caliper is likely in order.

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