Smart engineers are close to signing off development of the third-generation Fortwo minicar, and this time there will be both a regular two-door model and a new four-door variant called the Forfour (Smart has previously sold a Forfour but this was never available in the U.S.). While we’ve seen prototypes for both cars in our own spy shots, a new promotional video from Smart shows them on the move for the first time.

The video also features Smart chief engineer Markus Riedel who explains the three main phases of the car’s development: vehicle body and function, dynamic validation and winter testing. Riedel also confirms that the cars are ready to be revealed, which shouldn’t come as much of a surprise since the new Fortwo’s Renault cousin, the Twingo, has already been presented to the public.

Development of the car’s platform has been a collaboration between Smart and Renault. It features Smart’s signature rear-engine, rear-wheel-drive concept and has been designed to accommodate gasoline, diesel and electric powertrains.

Look for the new Smart Fortwo and Forfour to be revealed at the 2014 Paris Auto Show in October. Sales in the U.S. are likely to start in early 2015.

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