I found this...

BMW Workshop Manuals > X Series E53 X5 3.0d (M57) OFFRD > 2 Repair Instructions > 61 General Electrical System > 62 Rear Window Wiper > 4 RA Removing And Installing _ Replacing Spray Nozzle For Rear Window Washer Unit

The specialty tool I think is just a trim tool

http://www.unofficialbmw.com/images/tool-8.jpg

and here is a page on how to adjust the spray

http://workshop-manuals.com/bmw/x_se...w_washer_unit/