Hi guys, if you call the virtual garage in multiplayer, the other players can not see your vehicle.
If you get in the vehicle and drive around, the other players can see you floating around in a standing or a climbing position.
You are not able to run over the other players with your vehicle, because from their point of view, there is no vehicle. Other players can't get in your vehicle and they can easily walk through your vehicle.
It seems, that the vehicles in the Virtual Garage are not globally created. The Virtual Arsenal in return works flawlessly so far.
For a reproduction you need at least a second player.