A little late to the party, but had to comment for future searches on this topic.
All that is needed is a flat blade screwdriver to remove these escutcheons that are connected from the inside of the door panel. The screwdriver blade will lock against two of the nut angles, rotate, and this will be more than enough to loosen and tighten.
These nuts are not "torqued" down tightly and this approach is all that is needed to get them going.
I know, just did mine, 7/2013.
Matt