The Mercedes-Benz S class is the most popular luxury car for chauffeur service. It is known for its comfort, safety and features that make it the perfect car for high-end clients. The S-Class has a luxurious interior with leather seating, advanced entertainment system, and a range of advanced safety features. It also has plenty of legroom and headroom, making it comfortable for long rides. The spacious trunk and ample storage make it an ideal car for chauffeur service.