The "coupe sedan" or "four-door coupe" category exists as a way for automakers to combine the sporty, stylish design of a traditional two-door coupe with the practicality of a four-door sedan. This segment caters to customers who want a vehicle that looks sleek and dynamic but also provides easier access to the rear seats and more interior space for passengers or family use.
It started gaining popularity with models like the Mercedes-Benz CLS, which showed there was demand for sedans that looked sportier and more luxurious than traditional ones. Automakers realized that by lowering the roofline, enhancing the design, and keeping four doors, they could appeal to both emotional and practical buyers.
In short, this category is a marketing and design response to consumer demand for vehicles that blend style and function.
