Mercedes and BMW are notorious for OEM pads that emit a ton of dust. Just look at most of them driving down the road and you'll notice the front wheels look darker than the rears most of the time - except for that one E Class I saw the other day with clean fronts and nasty dirty rear wheels. Obviously just rotated the tires!

I swapped out all four corners to Posi-Quiet ceramic pads with 2500 miles on the car because I couldn't stand the brake dust build up. Now - virtually zero dust, not a squeak since install and braking power is still awesome.