Opel presents its new monocab Meriva Concept at the International Motor Show in Geneva (March 6 -- 16, 2008). The concept car features rear-hinged rear doors on both sides of the car called FlexDoors. While the front doors are conventionally designed with front hinges, the rear doors swing open towards the back of the car. Another feature of the new car is that the front and rear doors can open independently of each other while models featuring rear-hinged rear doors already on the market can only be opened after the front door has been opened. In 2007, every fifth Opel model sold is a monocab, with 335,000 units sold for the Zafira and Meriva models only.