The wire way works for the front and rear glass, although is not the preferred method with quarter glass. You end up damaging the rubbers on the quarter glass using the piano wire method. And if you painted your car you will most likely etch the paint. I've had glass guys break quarter windows on multiple 240's before I started removing them myself. One glass guy said the only way to remove the glass without damaging the rubbers was an induction heating machine that would heat the metal scorching hot and melt the urethane bead between the frame and glass. Supposedly this is the only correct way for the hatchback quarters. I didn't, nor did he know of any local glass guys that had this 1k machine. Another guy said he chopped out glass with a sawzaw like machine that acted like a air hammer with a sharp putty knife as the hammer. It would not be recommended for the quarters as the center-clips and such would be destroyed.

The way I did it was with a putty knife and heat. Buy a flexible putty knife, sharpen the edges razor sharp and heat the knife with a heat gun as you work your way around the glass. Heating the putty knife worked better than trying to heat the surrounding metal frame. This is all done from inside the cabin. It takes a LONG time but would you rather break your glass, destroy your rubbers, or worse, buy new glass that's outrageously priced?

Work your way around the centering clips and make sure you don't hack them off. This was done on s13 coupe quarters and IMO they are very fragile, if you wedge or pry them over an inch they will shatter.