The distinctive appearance of the BMW 5 Series has been shaped since 1972, when the first business-class model debuted. For 40 years, the Munich-based company has adhered to established traditions. Updates to the series are carried out every 3–5 years, but high consumer demand keeps the model on the assembly line. The BMW 5 Series is characterized by its recognizable design, powerful engines, and spacious interior with comfortable seats. The car is offered with gasoline and diesel engines ranging from 2 to 4.4 liters, as well as a choice between a 6-speed manual transmission and an 8-speed automatic.