Water leak

[mobenz]

Hello - I just acquired a 1987 300CD. When it rains, I get a significant amount of water in the trunk. It doesnt appear that there is a leak in the seal. From what I can see, the water appears to be coming in elsewhere. Could there be a plugged drain somewhere, perhaps as part of the ventilation system, and if so, where would I find it?

Thanks in advance.

Bud