I have had a 2006 C70 for a few months now. When I got the car I found some water in the tail light. I cleaned it out and let the carpeted cover dry (was wet on the inside (part siting inside the tail light housing). Inside (facing trunk) was not wet. No moisture in the trunk and seals around the trunk look like new. I don't see any cracks in the lens - just wondering if anyone has seen this and if so what the source of the issue is? Just happening during rain and the inside of the housing sitting below the gasket is wet - water pools in this area. It is not a huge amount of water, but, it is more than just condensation.

As a note, no rust on the car.

Thanks for any help!