The BMW 4 Series Gran Coupe, set to debut in 2014, was recently spotted test-driving around Germany. These pictures from this recent spotting provide insight into the possible final design of the four-door coupe.
According to Auto Express, "the car will ... bridge the gap between the 3 and 5 series. It will follow the same basic formula as the 6 Series Gran Coupe, so expect it to be based off the 4 Series coupe but have a longer wheelbase and two rear doors".
Be sure to check back for more updates as they arrive on the 4 Series Gran Coupe!