Renault made full use of its expertise in electric vehicles for the development of this innovative E-Tech hybrid powertrain. The project also relied on the enthusiastic and passionate support of the experts in engineering, development and control. Today, the E-Tech 4x4 300 hp powertrain came into being. Based on the E-Tech 200 hp, its development involved a number of ambitious changes. This sixth episode looks at the challenges faced by the brand in developing this expertly crafted 'super hybrid' powertrain.