Continuing our series of infographics based on the history of iconic car models, we bring you the History of the BMW 3 Series: Introduced in 1975 as a replacement for the '02' series, the 3 series has grown to become BMW's best selling model. Now in its sixth generation, it accounts for roughly 30% of BMW's total sales. An impressive Motorsport heritage, superior driving dynamics and brand prestige combine to make the 3 Series a truly aspirational motor car, that's within close reach for the…