When it rains or has rained heavily I hear trickling water when driving more than 50mph. It is around the windscreen or A pillar on the driver's side. The car does not leak but this is irritating and costly as the indie are unable to work out the issue nor have encountered it previously. The windscreen seal is ok and they reglued the scuttle. As I'm new to the 997 is this normal, could it be the sound of water blowing under boot area where battery is? If not any ideas please. Thanks.