Sunroof drain became clogged. this caused the poorly designed drains to leak at a junction inside the vehicle along the door pillar and behind the instrument panel. the water collects on the rear passenger floorboards and around the drivers seat. the car owner is unaware of the leak until a large amount of water has accumulated. i am very concerned about the potential for an electrical fault or short circuit that could potentially result in a fire, malfunction or could lead to an accident. volvo should make checking these drains a regular part of it's service procedures or consider a redesign or recall. this issue is widespread. *tr