I have a 2010 Sterling Europa, I don't know about getting any heating out of it but with regards to the hot water system, you must have water in the water heater before you turn on any power to heat the water or you could burn the element out, for getting hot water under your O/S front cushions you have your controls for your supply in to the caravan, on the panel there are four switches one says 'Water Heater' , don't turn this switch on till you have bled the system,