I did this, 
local me = getLocalPlayer() 
  
function toggleGhost() 
    setElementData(me, "hideGhost", not getElementData(me, "hideGhost"), false) 
    local e = getElementData(me, "hideGhost") 
    outputChatBox('[HIDE] Ghost are '.. ( e and "hidden" or "visible" ), 255, 100, 100, true) 
end 
  
addCommandHandler("hg", toggleGhost) 
bindKey("k", "down", toggleGhost) 
  
function hideGhost(GhostPlayback) 
    local vehicle = GhostPlayback 
    if vehicle then 
        if getElementDimension(vehicle) ~= 999 or getElementDimension(GhostPlayback) ~= 999 or getElementInterior(GhostPlayback) ~= 999 or getElementInterior(vehicle) ~= 999 then 
            setElementDimension(vehicle, 999) 
            setElementDimension(GhostPlayback, 999) 
            setElementInterior(vehicle, 999) 
            setElementInterior(GhostPlayback, 999) 
        end 
    end 
end 
  
function showGhost(GhostPlayback) 
    local vehicle = GhostPlayback 
    if vehicle then 
        if getElementDimension(vehicle) ~= 0 or getElementDimension(GhostPlayback) ~= 0 or getElementInterior(GhostPlayback) ~= 0 or getElementInterior(vehicle) ~= 0 then 
            setElementDimension(vehicle, 0) 
            setElementDimension(GhostPlayback, 0) 
            setElementInterior(vehicle, 0) 
            setElementInterior(GhostPlayback, 0) 
        end 
    end 
end 
 
The code where I got the line "GhostPlayback" is this, 
GhostPlayback = {} 
GhostPlayback.__index = GhostPlayback 
  
addEvent( "onClientGhostDataReceive", true ) 
addEvent( "clearMapGhost", true ) 
  
function GhostPlayback:create( recording, ped, vehicle ) 
    local result = { 
        ped = ped, 
        vehicle = vehicle, 
        recording = recording, 
        isPlaying = false, 
        startTick = nil, 
    } 
    setElementCollisionsEnabled( result.ped, false ) 
    setElementCollisionsEnabled( result.vehicle, false ) 
    setElementFrozen( result.vehicle, true ) 
    setElementAlpha( result.ped, 100 ) 
    setElementAlpha( result.vehicle, 100 ) 
    return setmetatable( result, self ) 
end 
 
It does not work, hit the "k" I get "[HIDE] Ghost are hidden", "[HIDE] are visible Ghost" but ghost driver is still visible. In "debugscript" not get errors. 
Do not know what to do, please help. Greetings.