It takes about 2.5-3.0 hours to take cassette out. Need to remove A,B and C pillars,both front sunvisors,four handles that on headliner,disconnect interior alarm sensor,drop the headliner, disconnect all four drain tubes, disconnect sunroof motor and unbolt cassette from the roof. Headliner and cassette both comes out from left rear door.
P.S. Sunroof glass lid needs to be removed first.