Hi Steve
I have just replaced the rear discs on my 2001 version of the same car and lost a bit of fluid when I was winding the pistons back in.  You have to remove the engine covers and the air filter cover to get access to the reservoir and then use a tube to pour fluid in.  I hate the design of these bl@@dy MPVs the engine is completely inaccessible!
                
 Dave Warren
                
 July 2008