No, it's all one piece. In order to get the >>
regulator out, you need to remove the glass, so you can access the top bolt.
Take a look at this repair kit: http://www.bmwrepairkit.com/
You must know that you can lock out the rear window controls, via the bottom button on the driver's door window controls?
Ed in San Jose. BMW CCA member since 1987 (Nr. 62319). Golden Gate Chapter. '97 540i 6 speed. Build Date 3/97. Aspensilber over Aubergine leather.