When I was having my two new rear tires mounted last week I noticed the outer of the rear pads was about 75 % gone so I bought a set of new pads from Autozone for $27 , they came with shims pre attached , this is a bonus as the shims reduce or eliminate the squealing noises disc brakes often make .
The edges of the pads were also chanmfered to promote rapid bedding in regardless of rotor surface ~ I almost never have rotors surface ground as that makes then thinner and more prone to fading , warping or simply poor performance .
I used my trusty long 1/8" flat nose punch and 32 Oz. ballpien hammer plus a pair of needle nosed pliers to remove the hair pins then the pad retaining pins , scrubbed out the accumulated brake dust with a toothbrush sized wire brush and tapped in the new pads , about 9 minutes per side , it took me longer to wash the accumulated brake dust off the wheels inside and out using wheel cleaner in a trigger sprayed from The Dollar Store and a 4" paint brush , I think a 1" brush would work better due to the holes and ribs in the " Bundt " typ alloy wheels but at least they're clean for a week or two......
Autozone says all but one (the cheapest) of their various grades of disc brake pads are ceramic now , this should mean longer life of the rotors (@ 380,000 + miles they're original and in VGC , no grooves/warping) and hopefully better performance , not that I've ever faulted the Mercedes brakes no matter how fast or furious I drive the car .
-Nate
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