As a way to increase braking performance, the brake pads and rotors are make of a softer material and may be in need of replacement after approximately 20,000 miles; owners should be vigilant about getting their brakes checked.
Car Problem Reports
Mercedes-Benz S550 Soft Braking Components May Wear After 20,000 Miles
Mercedes-Benz S550 Problem
Average Mileage: 24,630 mi (18,892 mi - 28,000 mi)