Hi, i have scripted a Engine-Toggle. But the Engine will not turned off. 
The Source 
function vehicleEngineToggle(source)
    playerVehicle = getPedOccupiedVehicle(source)
    playerSeat = getPedOccupiedVehicleSeat(source)
    engineState = getVehicleEngineState(playerVehicle)
    if (playerVehicle) then
        if (playerSeat == 0) then
            if (engineState == true) then
                setVehicleEngineState(playerVehicle, false)
                outputChatBox("Motor ausgeschaltet", source, 0, 200, 0, true)
                return
            else
                setVehicleEngineState(playerVehicle, true)
                outputChatBox("Motor eingeschaltet", source, 0, 200, 0, true)
            end
        else
            outputChatBox("Du bist nicht der Fahrer des Fahrzeugs", source, 200, 0, 0, true)
        end
    else
        outputChatBox("Du sitzt in keinem Fahrzeug", source, 200, 0, 0, true)
    end
end
addCommandHandler("motor", vehicleEngineToggle, false, false)
 
I dont get a error or something.