Wow. Sticking calipers would be my first thought.

But I will say I bought Mercedes boxed originals. Textar were cheaper and I knew they were OEM but I really wanted the reduced dust and to be certain they would be OEM.

Well when they came, they were stamped Textar with MB stamping. Go figure I thought. Not a big deal though, its not like the OEM were too much more.

These are the worst pads I have ever had. Like yours mine are wearing out way to fast. But for me its the fronts that are worst. Also the amount of dust they produce is 100 fold worse than the ones I pulled out (which were also OEM Benz stamped). I can wash my wheels and have them black a week later. Front calipers are rebuild ATEs.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car