I'm not exactly what you mean, I don't have a constant rattle. I want to adjust the pedal hight and engadgement. The factory setup has a machanism to adjust for wear and to use it, you stick your foot under the pedal and lift up. This *supposedly* does something. I haven't detected that it does anything, but I haven't looked at the mechanism and probably don't have any appreciable clutch wear at this point (a little over 8k mi).
If you have a constant rattle, you might try the foot thing, if that doesn't work, I would get it to the dealer ASAP. Clutch disks aren't covered by the warranty as they are a wear item.