The problem I have guys is that there kubelwagen is somewhere on the map (not in visual range) and I have to order the car to come back. I don't know how to select the car on the map (M key) and bring it back.
UPDATE, I was able to bring the car back by first pressing "space" key and then click (clicking the scroll wheel) on the destination spot. The next mission has started and I have to say the tutorials are a complete mess, I gave up on this game until it gets more polished and the tutorials get cleaned up.
If the KW Driver is in your squad, you should have his icon on the bottom with a car symbol (wheel) so you select the icon of the guy and order him around. That's Arma at least...