I just picked up our X5 last week sunday and already have run into 2 problems. Coolant tank sprung a leak but was changed under warranty. Now I got another leak, this time it's in the cabin. Just finished washing the car and noticed that the front passenger floor closest to the kick panel is wet. Any ideas where the leak may be coming from? Door seal? Plugged sunroof drain?
Appreciate any suggestions.
Thanks.

'01 X5 4.4 Sport