I had this on mine; the water first go into the satnav and the when full overflowed nicely. The entertainment control module did a very good job of catching the excess. This duly went pop and stopped any sound and video to the front of the car.
I took all units out, dried everything anx replacdd the satnav and entertainment modules, proved it all worked again and have now taken it all back out until i can find and fix the leak.
Have fun!
Andy