Which is higher in rank, S or A?

[DeNaomi]

S is higher in rank. The S-Class is the highest rank of Mercedes-Benz sedans; A-Class (including A0, A00) refers to compact cars; B-Class represents mid-range sedans. Vehicle classification originates from Volkswagen's method of categorizing cars in Germany. Generally, vehicle classes are divided into six levels: A00, A0, A, B, C, and D. More related information is as follows: class, wheelbase, vehicle length, engine displacement, and curb weight. A00-class passenger vehicles have a wheelbase between 2 meters and 2.3 meters, with an engine displacement of less than 1 liter; A0-class passenger vehicles have a wheelbase of 2.3 meters to 2.5 meters, with a displacement of 1 liter to 1.5 liters; A-class vehicles have a wheelbase ranging from about 2.5 meters to 2.7 meters, with a displacement of about 1.5 liters to 2.0 liters; B-class mid-range passenger vehicles have a wheelbase of about 2.7 meters to 2.9 meters, with a displacement from 1.8 liters to 2.5 liters; C-class premium passenger vehicles have a wheelbase of about 2.8 meters to 3.0 meters, with an engine displacement of 2.3 liters to 3.0 liters; D-class luxury passenger vehicles mostly feature a majestic appearance, extremely spacious interiors, and very powerful engines, with a wheelbase generally exceeding 2.8 meters and a displacement mostly above 3.0 liters.