How can i fix my broken drivers side window on a jag s type year 2000. the power is there but i will not go up or down all i can here is a crunching noise

Sounds like the window has come off the metal scissor runner, there is a metal fixture attatched to the bottom of the window, which has a channel groove,,,, the scissor runner has a nylon wheel at either end,which sits into the window frame groove..if these wheels come out, they cause a crunching noise..so, you need to remove door panel, and put window frame and runners together

For a X reg (2000) Jaguar S- type: to remove the rear left winder mechanism do the following... Remove the door panel: remove two Philips Screws from under the small rubber mat in the door pull recess. Starting at top outer edge lever the panel away from door using something that does not damage the paint (I used a flat wooden spatula) - you will hear the poppers as they release the panel; work down and around the panel using your fingers. At some point the bezel around the door opening handle will become loosened and you need to carefully remove it - I found this awkward. Lift the panel upwards off the door and remove the cable that goes to the switches. Next remove the large access cover made of soft material stuck on with body putty and the circular sticky plastic disc covering a hole in the lower centre of the door. Remove the loudspeaker - four bolts into door metal and a cable. Remove the trim strip from the bottom edge of the window opening. Assuming the window can be moved slide it so the securing peg can be seen through the small hole uncovered when you removbed the sticky plastic disk. It appears as two concentric circles of plastic, outside diameter about 1cm, with a hole through the middle. Knock out the middle peg with a punch of about 4mm dia. This will disappear into the door and will be needed later! Once the inner peg is removed the split outer peg can be pushed through releasing the window from the regulator mechanism. Pull the window all the way up and secure with duct tape to the side of the frame so it doesn't crash down. Remove three nuts securing the mechanism push it in to the door void and remove the electric plug. I did this through the speaker apperture and found it awkward to get out - patience is needed if yours is as difficult. Manoeuver the mechanism out through the access hole and survey the damage.