I know it's raining heavy now holy shizansky!!! Water is literally running in from where the mirror is on the glass but from the headliner, this sucks I had water ingress with two VWs and I hated that about them. I hate water leaks most. Any TSBs on this?

 

Dealt with the issue, to the point I completely dismantled the sunroof..removed headliner etc...
First check is to figure out why water is getting past where the glass meets the sunroof gasket. If this seal is air tight, the truck should be dry.
Water can be running from different spots on the backside of the headliner, but I also noticed that if water came in past the gasket on the forward middle part of the gasket it could run right down onto the top of the sunroof motor... and into the cabin where you are seeing the leakage.
Just open the sunroof to see. You can adjust where the glass sits on the gasket too...FYI
I made some subtle adjustments on mine. (the 4 little star drive bolts that hold the glass on the rails) I used a little mechanics mirror to see (while the sunroof is closed) if I had any air gaps. There was in my case.
Good starting place.

 

it is also quite common for the drain hoses in the sun roof to become blocked or even break.

 

This was pouring out of the headliner at the front windshield in the center though, could it be coming from the sunroof? Windshield topseal maybe?

 

it could be the windsheild, but your headliner is fiberglass so water can trevel the full length of the truck before appearing

 

Ah makes sense then.

 

This sucks, I hate water leaks

 

You better focus on drying out the water that has probably gotten into your electronics or you will have many issues coming up.

 

I covered the car with tarp overnight so as to limit more water intrusion, the dash and steering were dry in the morning although it was still raining, the edge of the headliner was damp but not wet anymore, what should I look for?

 

There was a TSB for the sealant failure at the factory at the corner of the windshield. The TSB is attached.

2003 Discovery 132K with all high miles services complete.