With factory-trained master technicians on staff, CW Performance in Apex, North Carolina, is the leading independent Mercedes-Benz service provider. Our combined experience in Mercedes-Benz repair, servicing, and after-market tuning and customization for Daimler goods spans more than 50 years. hold specialized knowledge that other technicians and businesses just do not have when it comes to fixing, maintaining, and modifying Mercedes-Benz cars.