1. you may have a dead battery
2. you forget the code if so the code should be on a stick on the right hinge in the trunk.
3.keys jammed/broken
thats my question to you
Mercury Grand Marquis was created in 1983.
You will find a sticker in the trunck with the factory code printed on it.
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.054 is the gap for the Mercury Grand Marquis.
Mine was under the trunk lid. When you open the trunk you can see it up underneath towards the back. A white sticker with 5 black numbers on it. '94 Grand Marquis
Ou812
No , the last model year for the Mercury Grand Marquis was the 2011 model
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yes
Just a long shot, but check inside the trunk for a sticker.