The 300C, a full-size luxury sedan produced from 2005 to 2010, is renowned for its distinctive retro-modern styling, drawing inspiration from classic letter series cars. Built on the versatile LX platform, shared with other notable and models, the 300C offers a bold and imposing presence. It was available with rear-wheel drive as standard, and an all-wheel-drive option, along with powerful engine choices including a 5.7L HEMI V8, delivering robust performance. The vehicle garnered significant critical acclaim, earning numerous awards for its design and engineering, positioning it as a standout in the luxury sedan market for customers seeking American luxury, comfort, and unique aesthetics. This comprehensive workshop repair and service manual provides detailed technical information for the 300, covering all models, engines, trims, and transmission types primarily for the North American market. The manual encompasses essential areas such as engine and transmission service, brake systems, suspension, steering, electrical systems, and interior components. It includes in-depth maintenance procedures, diagnostic guidance, troubleshooting steps, and specifications, all presented with the level of detail found in professional service shops. This resource is designed to empower owners, mechanics, and technicians with the knowledge needed to effectively maintain, diagnose, and repair their 300, ensuring its longevity and optimal performance.