Welcome to FTE.
Thank you for your service.
Check this out...last paragraph talks about the flat tow feature. Is this what the owner's manual said?
2007 Ford Edge Engine 3.5L V6 Specifications
Last post on this page says no issues:
http://rv.net/forum/index.cfm/fuseac...d/22053144.cfm
This is the link in the above, they say towable 'as is':
http://www.remcotowing.com/vehicles
By the way, I know this is 3rd party info, not the first hand info you are looking for. Hang on, you may get more posts in answer.
Good luck.