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