How many miles before you should need to replace front brake pads and rotors? on 2006 Mercedes-Benz E350

How often/# miles should you replace brake pads and rotors.

Asked by for the 2006 Mercedes-Benz E350
Rotors in M-Bs are usually replaced with pads when the pads are worn out because the thickness of the rotors will not last the life of the replacement pads. I have seen vehicles with as low as 30k mi or as high as 60k mi need brake replacement. Honestly, their life depends on your driving style.