Ok, having the headliner replaced on my daughters 96' 850 wagon as this is one item I don't mind paying someone to do. Mobil service comes out to your home and will replace for $175 - seems reasonable. My question - while the headliner is out what things should I be looking for to inspect/repair on my sunroof? The sunroof moves but stops moving after a few inches I think because of the liner bunching up and jamming, at least I hope. Also I think I need to clean out the rear drains since going thru car wash will cause a little water to drip and I know the front drains are clear.
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It takes a great deal of intelligence to recognize ones own ignorance

Car wash causes a little drip. That is not from the rear drains, it is because the seal around the glass roof is rusty and allowing water to go through. There is NO easy fix for that, although I did replace my roof glass from a 1998 to stop the leak. Pick & pulls are great for that. A V/S70 1998-2000 will work, but it is best to inspect it for rust before you buy it.

The rear drains cannot be seen with the headliner off. You can see the drain tubes as they pass through the rear tire wells.

The sun roof sticking is usually due to debris on the tracks. Or a plastic piece has jammed itself. I would take off the sunroof, just 4 T25 crews, clean out the tracks without removing anything else (do not expose the cables), and run the motor back and forth. Sparingly use either lithium grease or some other grease and coat the sliding surface, do NOT spray a bunch of lubricant on it.

Actually, $175 is a pretty good price. The DIY method requires 2 days, and it is not a lot of fun!

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Keeping it running is better than buying new

I thought this was a good price also. I particularly liked the fact that I could work on it while they had the liner out giving me better access. The leaking only happens on the back side so I assume the rear drains were clogged. Does not happen in regular rain showers. If the frame is rusted would not RTV applied after some rust inhibiting primer work?

When the (4) screws are removed is it easy to support while cycling back and forth? What do you mean by exposing the cables? May be obvious when I see them. Any pictures would be great. Thanks for your help.
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It takes a great deal of intelligence to recognize ones own ignorance

Robert has a pretty good video:

https://www.youtube.com/watch?v=jiDZqKKaMC8

The glass removal is at about the 5 minute mark. Prior to removing, tilt the sunroof up at the rear, then remove the plastic cover. After removing the 4 T25's slide the glass rearward about 1/2 inch and lift it up and out.

Do as Robert says regarding the seal. Use RTV or silicone sealant in a very fine bead all the way around the top of the glass.

When the glass is out and drying, inspect the rails where the plastic slides. Look for maple tree pin wheels, apple seeds, etc. You can use the sunroof motor to slide things around, just make sure it is in the raised position when you put the glass back on - it needs to slide into the pins.

When putting the 4 screws back, just 'finger' tighten them. Lower the sunroof, closed position, and push or pull the sunroof up or down so that it is level with the roof and side to side. Once it is to your liking, tighten the screws, and operate the sunroof ensuring that it closes properly. When you are satisfied with your work, tilt the sunroof up and reinstall the plastic covers on each side.


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Keeping it running is better than buying new

I saw Roberts video but it looks like he applied the RTV to the seal not the glass. Should be pretty simple.
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It takes a great deal of intelligence to recognize ones own ignorance

A very thin bead between the rubber and the glass. The hard part is removing all of the dirt under the rubber first.
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Keeping it running is better than buying new

Geeze, that's a hell of a deal.
Are they removing the headliner to replace the fabric? I kind of doubt it for that price. I did my 745 twice. Absolutely the most dreaded job I've ever done on a car. It did come out very nice (the second time!), but it just wasn't my kind of car repair.

Hopefully you can post back after it's done with the results.

As for sunroof lube? I'd use white lithium but would first try to identify what the factory used. Be sure to clean all the old lube out before relubing.
I probably wouldn't goop it on either to avoid trapping sand and dust in the lube.

This is a perfect time to inspect the drains for the sunroof cassette.

The rear drains tubing is found by the rear tire wheel well, just next to where the antenna is on the cars. You have 2, right and left.

If the windows do not retract try to clean the junk with a leaf blower and inspect the tracks and add some lube.

What kind of lube is recommended?

What kind of lube is recommended?