Shannon,
I take my wife's 2005 Chrysler Pacifica with a sunroof through a touchless high pressure carwash as well. When the blower moves over the top of her car, you can see the sunroof get pushed down slightly. However, I don't get rained on (been doing that to her car for 2 years now...)

One thing you may or may not want to look for is any hairline cracks in the body/roof of your FEH. I had to have a windshield replaced in my '92 Ranger. After I had it replaced, I noticed it leaked everytime it rained. When I took it back (both dealer and windshield repair facility) no one could find where it was leaking. After arguing with both places for months, I found 2 ahirline cracks in both upper corners of the windshield on the body of the truck. When they leak tested the windshield, they only sprayed the windshield and not the body of the truck. Just something else to have them (and you) think about....

Good Luck.