I use front brake pads at a rate of 60k-75k a set, but I drive very conservatively and time lights and traffic etc. so that I use the minimum amount of brakes possible. More agressive driving can really wear off the pads very quickly as Mercedes pads are very soft.

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Ali Al-Chalabi

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