Andrew:
I can confirm I have two of your three reported problems.
For the rear trunk leak, I simply removed one of the two drain plugs under the tire. Now at least the water getting in can get out...and not grow sea monkeys.
As for the rear sunshade, I too am stumped. It has been stuck in the UP position for a few months now. Nothing I've tried works.
I thought I saw another post on the forum about someone suggesting to remove the rear deck package, but I could not find the proper PDF on the factory service manual page
http://www.nicoclub.com/FSM/Q45/2002_Q45/2002_Q45/
Perhaps someone else can comment???
Modified by dsbrooks at 7:57 AM 11/26/2009