Exactly. It did save my old MK5 some years ago. My work colleague and I both left our cars in the work Car park on what was a very hot day in May. Not a cloud in the sky, but very hot (already at about 25°C if I remember). My car at the time had leather and it has horrible getting into the car at the end of the day when it was stifling hot and the leather burnt your legs.
Anyway, we both left our cars with the windows down a couple of inches to allow air circulation. We came back much later in the afternoon, and the sky was jet black and where I work had just suffered a horendous thunderstorm, and everywhere was awash with water. We went to our cars and luckily, my auto close had worked and shut all the windws, however my friends Astra was completely soaked inside. It took many months to dry out and he had to go almost everywhere for ages with the rear demister and AC on to clear the condensation.
