Hi, we have a 2011 Ci Carioca 694 purchased second hand 3 months ago. It has two fresh water tanks, one on the rear and one nearside. From reading reviews online, it would appear that this was a prototype, and the normal model only had the nearside one. My problem, and the dealer appears to be stumped as well, is that the water system doesn't automatically switch from one tank to the other, as you would think they should ! It seems to use the water in the rear tank first, but then nothing ! The other tank is still full ! Am I missing something ? Advice would be much appreciated ! Thanks.