Hi, there would have been a question about the charging maintenance of the comfort battery. In the trunk is such a socket with cigarette lighter connection. Can I connect the charger there or does this have to be done in a garage from an external socket? Question because the original charger of Mercedes is just such a cigarette lighter connection. If I plug it in in the car it would charge in the circuit and unload itself again, because the charger is the power to charge from the B atterie takes and gives again. Or do I think wrong there, and this socket is only for refrigerated chests etc.? Kind regards