Today it is raining very heavily in Auckland, New Zealand. And to my alarm I have noticed a large wet patch on the front lefthand seat.

This has not been caused by my passenger being frightened by a dose of wet-weather wheelspin from the 2.8l straight-six. Instead, it's a steady drip from the point where the A-pillar meets the roof.

I suspect that the sealing in the sunroof has worn out and is leaking water. Before I have everything ripped out, could anyone confirm this suspicion? I'm also hoping that this does not mean extensive rust has developed around the front of the roof ...