Originally Posted by
Weymar Osborne
Since you're a Star Alliance Gold and are traveling internationally, you should be able to access the Lufthansa Lounge or United Club. Just to be sure, look for the Star Alliance Gold logo at the entrance to the lounge.
The OP isn't departing on a *A flight from DFW on this itinerary so both the UA Club and the LH lounge are out. *A lounge access in MEX but not DFW.
There is a contract lounge that's quite decent if you have a Diners Club card, I believe Priority Pass as well. I forget the name of it off the top of my head, but using Diners Club lounge finder will point it out. Other than that, it sounds like AA would be your only other option.