Hello, have just bought me a 12V coffee machine for the Mondeo and now read in the user manual that you should use it only when the engine is switched off. Now my question, is there a danger for the device when the engine is running and can it be eliminated by a simple electronic component? The reason for my question is that my battery is already loaded enough due to mainly short distance driving and I do not know if it also has a coffee machine. thanks and greetings