No need to bring the MDX to a shop for this simple procedure. You may want to use a piece of pipe over the ratchet handle when attempting to loosen the drain plug. This will provide a longer handle for increased leverage, and will make it easy for you to remove the drain plug. This trick always works for me.
Of course, you should not use this setup to tighten the plug. Rather, a torque wrench with the proper setting (33 lbf-ft per owner's manual) should be used.