I was wondering how I can find where the leak is coming from....water drips from headliner right behind the visor on the driver side

 

First off have you had any problem with the sunroof or its drains before ? Open the sunroof and first be sure that no water is standing in either corner near the drains. If clear, carefully pour a small amount of water in one corner at a time to see if it will drain and yes it will be slow. Our '04 has 2 drains down and out on the lower engine side of the firewall, each on the far left or right side to check for success. If one drain is stopped find a small hose to cover the drain opening and by mouth only. NOT a high pressure air line that can disconnect the drain tube. If you find a problem or not clean and lube the sealing area of the sun roof with a good lube made for rubber to help the sealing. Don't know where you are but could snow and ice have been part of the problem ? Good luck and please report back. *B2*

 

I'll check this out, thank you. And yes, snow/ice were possibilities of the issue. So maybe it's not a true leak and that ice buildup forced water flow where it normally wouldn't have gone.