Originally Posted by
ffsim
You can't use the Platinum card to get into the MLL, only the Plaza Premium lounges. This was mentioned often throughout the thread. And there's no Plaza Premium lounge in the domestic YUL area, only on the international side. Once you get to YYZ, you'll have no problem.
Yup, you're right, I got confused and screwed up. Ah well, live and learn.