This is called Multicellular Caravan by Merhzellar. Here is a description from the company’s website:
In the camper market there is strong demand for new design and personalized, tailor-made solutions. Individualist tourists want a caravan that is made just for them.
The solution to the problem is offered by the “Mehrzeller” – the multicellular caravan. Using our Configurator, we set up a design that is unique for our customers, including their own layout that they can identify with. The configuration is generated by a computer using the customer’s inputs, and then the final design is done by parameters from the architects to yield an attractive and practicable result
Check out more at this link right here:http://www.mehrzeller.com/