At the rear, all control arms and wheel carriers on the five - link axle are of forged aluminium, which reduces the unsprung mass of the wheel - locating components by around three kilograms compared with a conventional design. (motor-prime.com)
New aluminum rear knuckles help reduce unsprung mass for improved ride and handling. (topspeed.com)
As an option a high - performance ceramic brake system with bronze - coloured 6 - piston fixed callipers at the front and single - piston floating brake callipers at the rear can be ordered, saving weight compared with the compound discs and thus reducing the unsprung masses. (emercedesbenz.com)