Does anyone know how to take them off, precisely ?

 

Do you mean the side rear windows, or the rear glass hatch?

if you asking about the rear side windows, you need to open the windows then pull the C clip off from those hinges (it will come apart) then on the b pillar side you need
to unscrew the 2 philips screws and yank the plastic cover off (carefull as you might broke the tab).
then just unscrew (2 screws on each windows) the whole thing will come off.

(you need to hold it, cuz it will fall as you unscew)

 

I agree, that procedure is 100% correct. I applied my limo tint with those windows out of the car.

 

thanks I managed - but you have to be waaaaaaaay careful with those plastic covers, they break off easily....