The C3e is structually identical to the C3 but the bunk beds are replaced with an inbuilt ensuite and toilet. The fully fibreglass ensuite has a diesel powered, hot water shower and wash basin and is separated from the toilet by a door when showering.
Water to the ensuite is supplied by either of two tanks (120L and 80L), so shower and drinking water can be kept separate if need be. There is also a third 80L grey water tank.
Diesel hot water is the system of choice for premium brands because of their reliabilty and ease of use.