For me the brake and gas it test is a very good indication of the mounts being bad. None of my engine mounts came of their perches. The Benz mounts don't fail the same way some other cars do by ripping apart. If the engine twist a couple of inches when you rev it I would say their bad.

Your hood shaking is a good indication to me that their gone too. You'll be amazed at the difference when you swap them out.