The 4.7-meter long Flextreme GT/E concept illustrates how extended-range electric vehicle (E-REV) technology can be plugged into large or mid-size vehicles.Opel will unveil its Flextreme GT/E concept car at the 80th Geneva Motor Show (March 4 – 14), that will boost the company’s credentials as a leader in green technologies, offering expressive design with efficient environmental performance – and engineered with German precision.