If the Akrapovič Evolution Line system replaces the Mercedes-AMG performance exhaust system, the Valve Actuator Kit (P-HF985) is not needed. The valves on the exhaust can be controlled from the car cabin. The Akrapovič Sound Kit (P-HF949) can be purchased as an optional part.

If the car is not equipped with a performance exhaust but with the basic Mercedes-AMG exhaust system, then the Valve Actuator Kit (P-HF985) is mandatory. The Akrapovič Sound Kit (P-HF949) is also highly recommended for complete control over exhaust sound regulation.