I've found Austro-Daimler as the manufacturer and the date is less clear, although 1908 seems to be the date when the A-Zug was built...I'm assuming this is an A-zug variant.
Unfortunately, none of this is correct.
I found this info which might be a little familiar: "The vehicle had two 125hp 6 cylinder engines that each drove a dynamo. There were 10 trailers originally, each trailer had an electric motor on each axle."
However, this part is correct. It used two 125hp Austro-Daimler aero engines (one at the front, one at the back of the traction engine), both driving generators. I'm not 100% sure who built this machine, but I have a fair idea. Austro-Daimler made the engines, but that was all. I'm looking for a name (named after the designer), and the year (between 1910-15). As a clue the designer also wrote a book on Road Trains, except it wasn't in English.
Still LOCKED for you, as you're close to solving this puzzle.