The iPhone control-unit can control the van via accelerometer, gas, and brake.

“Spirit of Berlin” is a project of the Artificial Intelligence Group, directed by Prof. Raul Rojas, at Freie Universitaet Berlin.

We have been building autonomous robots since 1998. Our group is the two-time world champion and five times European champion in robotic soccer. Our vehicle is up and ready with drive-by-wire technology. Its name is: “Spirit of Berlin”.

http://robotics.mi.fu-berlin.de/pmwiki/pmwiki.php