Not bad for a non native german speaker, indeed!
Yes, the puzzle car was Friedrich Goebel´s walking car, he has presented in Breslau in 1914.
He has experimented with this principle for years and other results were the truck and even the tank shown here.
The tank was the so called "Landpanzerkreuzer".
And here´s the proof that the man is spelled "Goebel":