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In its new 4 Series Convertible, BMW moves from a hardtop to a new soft-top roof.
BMW 2021 4 Series Convertible has new soft top
Fabian Kirchbauer/BMW/TNS
In its new 4 Series Convertible, BMW moves from a hardtop to a new soft-top roof, which the car manufacturer says allows for weight reduction, more cargo space and a lower center of gravity. 
