I have a Rowenta DZ9080 Advancer steam iron leaking water?

I have had it for about 5 years but have rarely used it because it started leaking out the bottom of the sole plate when I try and iron with it. I am making a quilt and it needs to be pressed and ironed constantly so I tried it again and it still leaks. Does anyone know how to fix this or where to get a repair manual for it?

Jane
February 2014