Mercedes-Benz C-Class (including C63 AMG) (W204, 2007–2014). The W204, including the V8 C63 AMG. JRZ’s handbuilt dampers for the W204 come in multiple levels of adjustment, up to 3-way double-adjustable, and are custom-valved to your car and your goals. As the official U.S. JRZ distributor, we help you choose the right kit and valving and get you set up, shipped fast.