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The manual says you have to remove the inside door handle assembly in order to get at the window clamp attachment bolts. You have to hook the door module back up (which you'd have disconnected to take the door panel off) and raise the window to the full up position (you'd have put it down to remove the door panel). You then need to TAPE the window in place. You then loosen the clamps from the glass and "lower" (I don't know if this means with the switch or manually, but there is a CAUTION about the "express down" feature) the regulator clamps to the full down position. Remove the 3 nuts from the regulator/motor assembly and the whole thing should come out.
When you put it back in it says to 'carefully raise the window regulator clamps to the full up position, engaging the window'. Untape the window, lower the window about two inches. Seat the window 'fully rearward against the center pillar'. Adjust the window forwad 2-3mm (5/64-1/8"). Set the glass with the clamp fasteners. Tighten the window clamp fasteners to 93 in/lbs (INCH lbs).
I've never done it, but it looks like removing the door panel and water deflector is 80% of the battle.