Add vehicle owners to the game.

This will prevent teammates stealing your vehicles just became you exited to repair it.

This could work by being within a short proximity of a vehicle, the original claimer of a vehicle will receive a diving helmet symbol above their head to show enemies and friendlies within short distant who the owner is. If a teammate wants to enter the vehicle they will be put in the next available seat. if a spot isn't available or there is none, they simply can't enter and can not enter the drivers seat. Only when the vehicle owner has either left the proximity area of the vehicle, died or the owner's time has run out of ownership if the owner isn't actively doing anything to the vehicle like repairing it for example.