Hello I have a new to me 2007 MCS. I have had this for about 1 month. today it is raining quite hard and I got in the car to pick up my son there was no water. When I drove a way water poured from the little overhead reading lamp. You can see water in it. It stopped after a few seconds and I carried on. There doesn't seem to be any water anywhere else and the headliner was dry before I pulled away. I do have a sunroof. My rearview mirror is attached to the windshield. Does anyone know if this is the Sunroof drains or do you think it is the seal around the windshield. There is no water on the floor. It didn't continue to leak. I will see if it does it again when I go back out for a drive.
Thanks for any suggestions.
I am not under warranty.

 

I certainly start with th sunroof drains - clogs there are fairly common