i just went through this myself... jan must have been "sell brakes month"...
it is true that the rotor and pads are of a softer metal than others, this is to provide smoother braking, but it does increase wear.
MBZ will not turn a rotor apparently because of the soft composition causing the replacement.
I went to anothe rMBZ shop ( not a dealer ) and they confirmed a lot of this but when they invited me into the shop to inspect the rotors and showed me that they really did not need to be replaced, they won my business.
I had about 10,000 miles of highway driving on the car so I was suspect on if the pads and rotors really needed replacing anyway.
get a second opinion.
my .02 and YMMV ( heh, literally )
it is true that the rotor and pads are of a softer metal than others, this is to provide smoother braking, but it does increase wear.
MBZ will not turn a rotor apparently because of the soft composition causing the replacement.
I went to anothe rMBZ shop ( not a dealer ) and they confirmed a lot of this but when they invited me into the shop to inspect the rotors and showed me that they really did not need to be replaced, they won my business.
I had about 10,000 miles of highway driving on the car so I was suspect on if the pads and rotors really needed replacing anyway.
get a second opinion.
my .02 and YMMV ( heh, literally )