Aixiliary warm air heater?

[Yodaegghoover]

Hi, I've got myself a little confused, so was wondering if anyone can clarify something please? My MP is fitted with 'hot water auxiliary heating', thats controlled from the main dashboard. However, I was led to believe that the westfalia central control panel only shows the 'auxiliary warm air heater, icons if it is fitted to the vehicle. My mp displays this option (though with an error), has the cabin sensor fitted by the sliding door, but I cannot see any vents, believed to be under the passenger seat. The passenger seat doesnt have a plastic cover over it, but the right does. Looking at other mp pics this doesnt appear to be unusual. Any advice is greatly appreciated. Tks