addEventHandler("onVehicleStartEnter",resourceRoot,
.... You cannot exacly drive get into the resource... lol
Use this:
-- createObject
local x,y,z = getElementPosition(Vehicle)
local marker = createObject ( 1318, x,y,z+2, 0, 0, 0 )
addEventHandler("onVehicleStartEnter", Vehicle, function ()
attachElements (marker,Vehicle,0,0,2)
end )