RENNtech Carbon Fiber Rear Diffuser for 219 - CLS ClassRENNtech Pre Preg Carbon Fiber Rear Diffuser for the 219 CLS Class RENNTECH's carbon fiber rear diffusers manage the airflow underneath the car, creating low pressure areas that act like a vacuum, pulling the car to the ground for enhanced down force and stability at speed. In addition, the rear diffuser offers an aggressive look and enhancing rear styling. The diffuser is available in both matte and gloss UV protected finishes CLS 55 AMG Kompressor