In the smart cities of tomorrow huge amounts of data have to be processed. Cellular networks alone are unlikely to be able to cope with the amount of data and would introduce a critical dependence. Cars, on the other hand, are ubiquitous - even after massive disasters - and will be equipped with abundant communication technologies. This makes them a salient basis for connecting users and machines of smart cities. Discovery and providing services in such a highly dynamic network is a challenging task. We tackle this problem in our Car4ICT architecture which could be shown to work very well in simulations. The next logical step is to investigate the performance in experiments. To perform experiments we built a prototype which is able to emulate multiple vehicles on just a few machines. We show the feasibility of the proposed service discovery protocol and our emulation approach.