I think Peter meant that the MB pads are softer and smaller than the buick pads. MB uses a softer compound that performs well but wears faster and creates more black dust due to the amount of synthetic graphite in the pads.

If you go to fastlane at the top of the page, you can find very good prices on all brake components. Typically on Mercedes, the min pad thickness if 2 mm and the wear sensor is supposed to come on with 3 mm left.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record