Has anyone got the approved electric tow bar fitted. I have one fitted and tow a caravan with Alko hitch lock which means the tow bar has to be kept perfectly clean. Has anyone come up with a way of stopping the ball getting rusty when stored away under the bumper. The problem is the tow bar when stowed is upside down and therefore if you put a cover on it water sits inside this cover and the ball is then sitting in water. I don't want to cover in grease as this needs to be cleaned off completely before i hitch up the caravan. Also does anyone know if there is a cover available to fit in the hole in the bumper when the tow bar is stowed as this would also help matters. Any suggestions or help would be appreciated.