That's it then we won't pay any attention to what you two say from now on then!
Car looks ok apart from the tint and the hole in the bumper, nice wheels.
Have you checked the drain in the bottom of the door, or the boot seal? Not sure if the zed had a drain under the window screen scuttle panel but it's worth checking. Leaks are a bloody pain!
This. My bet would be the battery they cause all sorts of strange electrical problems when duff. As Brillo said even a knackered battery will read 14v once it's running on the alternator.