In the U.S., we've come to know the Smart brand just for its ForTwo, but other markets have seen a wider variety of models from the Daimler brand including the Smart ForFour that was produced from 2004 through 2006. This bigger vehicle from Smart added two extra doors and a rear seat for some passenger space. While we've already seen spy photos for the next ForTwo, judging by these spy shots of a stretched-wheelbase test mule, Smart is hard at work developing a next-generation ForFour as well.

Although the previous ForFour was a result of a collaboration between Daimler and Mitsubishi, the new model is going to be a venture between Daimler and Nissan/Renault. Under the Penske ownership, it was announced that the new Smart B-segment car would be based on the Nissan Micra (which was later scrapped), but we hear that this car will actually ride on a new platform that will eventually be the basis for the next Renault Twingo. Like the current and upcoming ForTwo, the 2015 ForFour will be a rear-engine/rear-wheel-drive car.

While we don't have any information as to what will power the new Smart ForFour, we can almost guarantee that it (along with the new ForTwo) will have a styling that will be very similar to recent Smart concept cars like the ForStars, For-Us and ForVision. The new ForTwo is expected to go on sale in 2014 with the bigger ForFour hitting dealers a year later.