Vehicles respawn once but after that weather they are deserted or destroyed they dont respawn anymore
these are respawn attributes
Delay :10
Deserted distance: 200
Tickets: *empty*
Expression: *empty*
Position: Starting position
position select: Random
Wreck: Delete
Notification: Disabled
Forced Respawn: Disabled
Respawn when disabled: Enabled
Also i haven't written anything in the init box.