What is the size standard for D-segment cars?

[OHazel]

Luxury cars are also known as D-segment cars. Generally, vehicles in this category have a wheelbase exceeding 3000mm, a body length over 5000mm, and an engine displacement above 3.0L. 1. Typical luxury cars include the Mercedes-Benz S-Class, Maybach, and Rolls-Royce Phantom. 2. Luxury cars can be divided into two types: one is civilian-grade luxury cars, which are the top models of conventional brands, such as the Audi A8L; the other is luxury brand models, such as the Bentley Arnage, where extended versions are very common, offering extremely spacious interiors. 3. Many cars are custom-made according to customer requirements. Representative models: Audi A8L, BMW 7 Series, Mercedes-Benz S-Class, Lexus LS, etc.