My S-Max, until now one of our favourite ever purchases, is in the garage. We started getting electrical faults (parking sensors, windscreen wiper). The garage found that under the boot the car was full of water. It must have been like that for a while with no external symptoms even though we're in and out of the boot all the time. We're now looking at replacement or reconditioning of some of the electrics including the main junction box. It seems to be the result of a faulty drain but I don't know much more than that because I haven't seen the car for over a week. Am anticipating a massive bill which seems to be the result of a manufacturing fault.