The headliner is difficult to remove, if you never removed a headliner before then you might want to take it in and have it done.

I removed the front, center and rear side panels first. Then I removed the sunvisors and front light assembley.
Then the trim around the sunroof. The headliner has clips facing the rear of the vehicle - carefully shift the headliner to the front and pull down the rear of the headliner. The headliner should rest on the head rests of the seats, you may need to disconnect the wiring to the dome lights.

I would not remove the headliner at this time. First move the sunroof back a few inches - you may need to use the special wrench if necessary. Then remove the front dome light assembley. The sunroof motor is located above the front dome light assembley - remove it. You should know be able to move the sunroof back and forth with your hands.

If the sunroof sticks then further investigation may me required - the cable and/or guide may need replacing.

If the sunroof move freely then visually check the sprial of the spring while manually moving the sunroof while looking at the cable through the opening where you removed the sunroof. If this looks ok then manually move the sunroof fully open. Then move the sunroof switch to the full open position with the sunroof motor still out. Then bolt the sunroof back in place. The aligns the sunroof motor with the sunroof position.

If the sunroof motor won't move when you engage the switch, make sure you have the key in the ignition and in position 2. Check the connection of the cable to the sunroof motor. Make sure you have power going to the switch. Check the switch , make sure you have power going to the motor with the switch engaged. Last check the motor.

Good luck.

__________________
Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles